蜚聲中(zhong)外的(de)(de)(de)唐代(dai)京師長(chang)安(an),以(yi)及東都洛陽,實際上都是(shi)在隋代(dai)建造的(de)(de)(de),創(chuang)建這兩(liang)座歷史(shi)名城的(de)(de)(de)第一功臣(chen)是(shi)杰出的(de)(de)(de)建筑學(xue)家(jia)宇(yu)文愷。
宇(yu)文(wen)愷,字安樂,鮮(xian)卑族。西魏恭帝(di)二年(555年)生于(yu)長安。他出生在北(bei)朝(chao)后(hou)期一(yi)個顯(xian)赫的豪門。
出生在(zai)(zai)這樣一個家庭中的(de)宇(yu)文愷(kai),二歲時就被贈爵雙泉(quan)縣(xian)伯,六歲時襲祖爵安(an)平郡公,但(dan)身在(zai)(zai)將門的(de)宇(yu)文愷(kai)卻(que)不好弓馬(ma),而喜(xi)好讀書(shu)。《隋書(shu)》本傳說“愷(kai)少有(you)器局。家世武(wu)將,諸(zhu)兄并以弓馬(ma)自(zi)達,愷(kai)獨好學,博(bo)覽書(shu)記(ji),解屬文,多(duo)伎(ji)藝,號為名父公子。”這段(duan)記(ji)載可窺知他為學的(de)大致情(qing)況。
北(bei)周(zhou)末,宇文愷累遷右侍上士、御正中(zhong)大夫、儀同三司。大象二年(580年),楊(yang)堅任北(bei)周(zhou)宰相后,宇文愷又被任命為(wei)上開府、匠(jiang)師(shi)中(zhong)大夫。據(ju)《唐六典》卷二三“將(jiang)作都水監(jian)”記(ji)載:“后周(zhou)有(you)匠(jiang)師(shi)中(zhong)大夫一人(ren),掌城郭、宮(gong)室之制及諸器物(wu)度(du)量。”又據(ju)考證,北(bei)周(zhou)設有(you)“匠(jiang)師(shi)中(zhong)大夫,一人(ren),正五命”。因此可以推知,當時年輕(qing)的(de)宇文愷已經在建筑科學和(he)工(gong)程管理(li)方(fang)面(mian)嶄露鋒芒。
581年(nian),楊堅建立隋(sui)(sui)朝(chao)(chao),是(shi)為(wei)隋(sui)(sui)文(wen)帝。為(wei)了鞏(gong)固自己(ji)的(de)(de)統治地位(wei),他(ta)大肆誅殺北周(zhou)宗(zong)(zong)室宇(yu)(yu)文(wen)氏,以清(qing)除北周(zhou)殘余勢力。宇(yu)(yu)文(wen)愷(kai)原(yuan)也被定入誅殺之列。由于宇(yu)(yu)文(wen)愷(kai)家(jia)族與北周(zhou)宗(zong)(zong)室有別(bie),二兄宇(yu)(yu)文(wen)忻又擁戴(dai)隋(sui)(sui)文(wen)帝有功(gong),加上他(ta)本人的(de)(de)才華深得隋(sui)(sui)文(wen)帝的(de)(de)賞識,因而方幸免一死。隋(sui)(sui)文(wen)帝“修宗(zong)(zong)廟”,宇(yu)(yu)文(wen)愷(kai)被起(qi)用,任營宗(zong)(zong)廟副監、太子左庶子,負責宗(zong)(zong)廟的(de)(de)興修事務。宗(zong)(zong)廟建成(cheng)后(hou),被加封為(wei)甑山(shan)縣公,邑千(qian)戶,隨后(hou)投(tou)入了隋(sui)(sui)代都(dou)城(cheng)大興城(cheng)(今(jin)(jin)西安(an)城(cheng))的(de)(de)營建工(gong)程。隋(sui)(sui)朝(chao)(chao)建立之時,仍(reng)承(cheng)襲北周(zhou)以長安(an)城(cheng)為(wei)京(jing)都(dou)。長安(an)城(cheng)始(shi)建于漢代,已有近八(ba)(ba)百年(nian)的(de)(de)歷史,城(cheng)市已顯(xian)得過于狹(xia)小(xiao),宮宇(yu)(yu)亦多(duo)朽(xiu)蠹(du),加上供水(shui)、排水(shui)嚴(yan)重不(bu)(bu)暢,污(wu)水(shui)往往聚而不(bu)(bu)泄,生活用水(shui)受到嚴(yan)重污(wu)染(ran),已經(jing)不(bu)(bu)能適應社會發展(zhan)和人們生活的(de)(de)需要。因此(ci),隋(sui)(sui)文(wen)帝嫌其“制度狹(xia)小(xiao),又宮內(nei)多(duo)妖異”,通直散騎常侍庾季(ji)才也奏云:“漢營此(ci)城(cheng),經(jing)今(jin)(jin)將八(ba)(ba)百歲,水(shui)皆咸(xian)鹵(lu),不(bu)(bu)甚宜人。”于是(shi)決定另(ling)建新都(dou)。
開(kai)(kai)皇(huang)二年(nian)(nian)(582年(nian)(nian))六月,隋(sui)文(wen)(wen)帝下(xia)(xia)詔(zhao)(zhao):“此城(cheng)從(cong)漢,凋殘日(ri)(ri)久(jiu),屢為(wei)(wei)戰場,舊經喪亂。今(jin)之(zhi)(zhi)宮(gong)(gong)室,事近權(quan)宜,又(you)非(fei)謀(mou)筮從(cong)龜,瞻星揆日(ri)(ri),不足建(jian)(jian)(jian)皇(huang)王之(zhi)(zhi)邑,合大(da)眾所聚”,“今(jin)區宇(yu)寧(ning)一,陰陽順(shun)序,安(an)安(an)以遷,勿懷胥怨。龍(long)首山川(chuan)原秀麗,卉物(wu)滋(zi)阜,卜食相(xiang)土(tu),宜建(jian)(jian)(jian)都(dou)邑,定鼎之(zhi)(zhi)基(ji)永(yong)固,無窮(qiong)之(zhi)(zhi)業在(zai)(zai)斯。公私府宅,規模(mo)遠近,營構(gou)資(zi)費(fei),隨事條奏。”隋(sui)文(wen)(wen)帝下(xia)(xia)詔(zhao)(zhao)于(yu)是“詔(zhao)(zhao)左(zuo)仆(pu)射(she)高颎、將(jiang)作(zuo)(zuo)大(da)匠劉龍(long)、巨鹿郡公賀婁子干、太(tai)府少卿高龍(long)叉等創造新(xin)都(dou)”。“以太(tai)子左(zuo)庶(shu)子宇(yu)文(wen)(wen)愷有巧思,領(ling)營新(xin)都(dou)副(fu)監”。時高颎雖為(wei)(wei)大(da)監,不過總領(ling)大(da)綱(gang),而(er)規模(mo)計劃皆(jie)出自宇(yu)文(wen)(wen)愷。由于(yu)楊堅在(zai)(zai)北周時曾(ceng)被封為(wei)(wei)大(da)興(xing)郡公,故新(xin)都(dou)命名(ming)為(wei)(wei)大(da)興(xing)城(cheng)(今(jin)陜西(xi)西(xi)安(an))。開(kai)(kai)皇(huang)三年(nian)(nian),新(xin)都(dou)建(jian)(jian)(jian)成,而(er)倉廩尚虛,需要(yao)大(da)量轉運(yun)關(guan)(guan)東米粟,渭水多沙(sha),不便漕運(yun)。四年(nian)(nian),下(xia)(xia)詔(zhao)(zhao)興(xing)建(jian)(jian)(jian)漕渠(qu)(qu),令宇(yu)文(wen)(wen)愷率領(ling)水工鑿渠(qu)(qu),引渭水通黃河,自大(da)興(xing)城(cheng)東至潼(tong)關(guan)(guan)三百余里,名(ming)叫廣通渠(qu)(qu)。渠(qu)(qu)成后,轉運(yun)便利,隋(sui)唐(tang)關(guan)(guan)中的(de)富庶(shu)頗得益于(yu)此。其后,他受到其兄宇(yu)文(wen)(wen)忻被殺事件(jian)的(de)牽連,一度罷官(guan)居家(jia)。開(kai)(kai)皇(huang)十三年(nian)(nian),隋(sui)文(wen)(wen)帝要(yao)在(zai)(zai)岐(qi)州(今(jin)陜西(xi)鳳翔)建(jian)(jian)(jian)仁(ren)壽(shou)宮(gong)(gong),經右仆(pu)射(she)楊素推薦(jian),文(wen)(wen)帝任命愷為(wei)(wei)檢校將(jiang)作(zuo)(zuo)大(da)匠,后又(you)拜為(wei)(wei)仁(ren)壽(shou)宮(gong)(gong)監、將(jiang)作(zuo)(zuo)少監。在(zai)(zai)楊素主持下(xia)(xia),仁(ren)壽(shou)宮(gong)(gong)建(jian)(jian)(jian)造得非(fei)常華麗,成為(wei)(wei)隋(sui)文(wen)(wen)帝經常臨幸的(de)別宮(gong)(gong)。
開(kai)皇十三年(nian)(nian)(593年(nian)(nian))二(er)月,隋文帝令楊素在(zai)岐(qi)州(zhou)(今(jin)陜西鳳翔)北營造仁(ren)壽宮(gong)(gong)。楊素以(yi)宇(yu)文愷有(you)巧思(si),“奏前萊州(zhou)刺史宇(yu)文愷檢校將作大匠”,負責(ze)仁(ren)壽宮(gong)(gong)工程的(de)籌(chou)劃(hua)和設(she)計。“于(yu)是夷山堙谷以(yi)立宮(gong)(gong)殿(dian),崇臺累榭,宛轉相屬”,整個宮(gong)(gong)殿(dian)區“制度壯麗”,是一組(zu)極(ji)其雄偉的(de)宮(gong)(gong)殿(dian)建(jian)筑群。開(kai)皇十五年(nian)(nian)三月,仁(ren)壽宮(gong)(gong)建(jian)成,宇(yu)文愷被任(ren)命為仁(ren)壽宮(gong)(gong)監,授儀(yi)同三司,接著(zhu)又被任(ren)命為將作少監。
仁壽二年(602年)八月,隋文帝(di)皇(huang)后(hou)獨孤氏卒。閏(run)十月,楊素和(he)宇(yu)文愷受命營造(zao)皇(huang)陵太陵。獨孤皇(huang)后(hou)葬后(hou),宇(yu)文愷復爵安平郡公,邑千戶。
仁壽(shou)四年(nian)七月,隋煬(yang)帝楊廣繼位(wei)。鑒于(yu)大興(xing)城(cheng)位(wei)置偏西,又水(shui)(shui)陸交通不(bu)便(bian),也(ye)(ye)為了更(geng)進一(yi)步加強(qiang)對河北、山東以(yi)及江淮地區的(de)控制,決定(ding)在(zai)洛(luo)陽(yang)故都附近建造新城(cheng),作為東京(jing)。十一(yi)月癸丑,隋煬(yang)帝在(zai)巡幸(xing)洛(luo)陽(yang)時下詔說,洛(luo)陽(yang)的(de)地理位(wei)置“控以(yi)三(san)河,固以(yi)四塞(sai),水(shui)(shui)陸通,貢賦等(deng)”,“今(jin)可于(yu)伊(yi)、洛(luo)營(ying)建東京(jing),便(bian)即設官(guan)分職,以(yi)為民極也(ye)(ye)”。
據《隋書(shu)·煬帝(di)(di)紀》記(ji)載,大(da)(da)業(ye)元年(605年)三月丁未,隋煬帝(di)(di)“詔尚書(shu)令(ling)楊素、納言楊達(da)、將作大(da)(da)匠宇(yu)(yu)文(wen)愷(kai)營(ying)建東(dong)(dong)京,徙(xi)豫州(zhou)郭(guo)下(xia)居人(ren)以實之”。又據《資治通鑒》卷(juan)一八零記(ji)載,“每月,役丁二(er)百萬人(ren)。徙(xi)洛州(zhou)郭(guo)內居民(min),及諸州(zhou)富商大(da)(da)賈數萬戶以實之”。大(da)(da)業(ye)二(er)年春(chun)正月辛酉,“東(dong)(dong)京成”,其(qi)(qi)營(ying)建過程(cheng)前(qian)后(hou)僅歷(li)十個月,是(shi)又一座在短時(shi)間內經(jing)周密(mi)規劃、設(she)計、建造而成的大(da)(da)型城(cheng)市。在營(ying)建東(dong)(dong)京時(shi),宇(yu)(yu)文(wen)愷(kai)“揣(chuai)帝(di)(di)心(xin)在宏侈,于(yu)是(shi)東(dong)(dong)京制度窮極壯麗”。故此(ci)宇(yu)(yu)文(wen)愷(kai)博得隋煬帝(di)(di)的歡心(xin),被進位開府(fu)儀同(tong)三司(si)。其(qi)(qi)間,宇(yu)(yu)文(wen)愷(kai)還受命在河南郡壽(shou)安(an)縣(今河南宜陽)營(ying)造顯仁宮(gong),“南接(jie)皁(zao)澗,北(bei)跨(kua)洛濱(bin)”,為此(ci),曾“發大(da)(da)江之南、五嶺以北(bei)奇(qi)材異石,輸之洛陽;又求(qiu)海內嘉木異草,珍(zhen)禽奇(qi)獸,以實園苑(yuan)”。
隋煬(yang)帝楊廣即位(wei)后(hou),要營建(jian)洛陽,又(you)以愷(kai)為(wei)營東都(dou)副監,后(hou)遷將(jiang)作(zuo)(zuo)大(da)匠。宇文(wen)愷(kai)把東都(dou)建(jian)筑得極其壯麗,因此被升為(wei)工(gong)部尚書。他(ta)曾(ceng)經(jing)建(jian)造大(da)帳(zhang),帳(zhang)下可(ke)以容納(na)數(shu)千人(ren)(ren)。又(you)造觀(guan)風行(xing)殿(dian),殿(dian)上(shang)可(ke)以容納(na)侍(shi)衛(wei)數(shu)百人(ren)(ren),行(xing)殿(dian)下裝輪軸,可(ke)以迅速(su)拆卸和(he)拼合。他(ta)曾(ceng)建(jian)議按古制(zhi)建(jian)筑明堂,“下為(wei)方堂,堂有五室,上(shang)為(wei)圓(yuan)觀(guan),觀(guan)有四門(men)”,并曾(ceng)用木料制(zhi)作(zuo)(zuo)了模型(xing)。雖然沒有興(xing)建(jian),卻表(biao)現了他(ta)的(de)巧思和(he)學識的(de)淵博。大(da)業八年(612年),宇文(wen)愷(kai)卒(zu)。
宇文(wen)愷在建筑(zhu)學(xue)方面的(de)著述有(you)《東都圖(tu)(tu)記》20卷,《明堂(tang)(tang)圖(tu)(tu)議(yi)》2卷,《釋疑(yi)》1卷,均見行于世。但除《明堂(tang)(tang)圖(tu)(tu)議(yi)》的(de)部分內容保存在《隋書·宇文(wen)愷傳(chuan)》、《北史·宇文(wen)貴傳(chuan)》和(he)《資治通鑒》等史籍(ji)中外,其他的(de)后(hou)來都亡佚(yi)了,這實(shi)是建筑(zhu)學(xue)史上的(de)一大損失。
政治、經濟、文化中心
大(da)(da)(da)興(xing)城的營建,史稱“制(zhi)度多出于高颎”,“高颎雖總(zong)大(da)(da)(da)綱(gang),凡所規畫,皆出于愷(kai)(kai)(kai)”。宋代的宋敏求在(zai)《長安志》中也說在(zai)隋大(da)(da)(da)興(xing)城興(xing)建時,“命左(zuo)仆射高颎總(zong)領其事,太子左(zuo)庶(shu)子宇文愷(kai)(kai)(kai)創制(zhi)規模,將作大(da)(da)(da)匠劉龍(long)、工部尚書巨鹿郡公賀樓(婁)子干、大(da)(da)(da)(太)府少卿尚龍(long)義(yi)并(bing)充使營建”。可(ke)見高颎主要(yao)是提(ti)出都城的總(zong)的制(zhi)度,并(bing)負責(ze)總(zong)的施(shi)建方針,而具體的規劃(hua)、設計則是由宇文愷(kai)(kai)(kai)完成的,其他的副使主要(yao)是協(xie)助負責(ze)施(shi)工和材(cai)料管(guan)理(li)諸(zhu)事務。
大興(xing)城(cheng)(cheng)的(de)興(xing)建(jian)(jian)(jian),不是在舊有基礎上進行(xing)改(gai)建(jian)(jian)(jian)、擴建(jian)(jian)(jian)而(er)成的(de)城(cheng)(cheng)市(shi),而(er)是在短時(shi)間內按周密(mi)規劃興(xing)建(jian)(jian)(jian)而(er)成的(de)嶄(zhan)新城(cheng)(cheng)市(shi)。全(quan)城(cheng)(cheng)由宮(gong)城(cheng)(cheng)、皇(huang)城(cheng)(cheng)和(he)郭城(cheng)(cheng)組成,先建(jian)(jian)(jian)宮(gong)城(cheng)(cheng),后建(jian)(jian)(jian)皇(huang)城(cheng)(cheng),最后建(jian)(jian)(jian)郭城(cheng)(cheng)。開(kai)皇(huang)二年(582年)六月(yue)開(kai)始興(xing)建(jian)(jian)(jian),十二月(yue)基本竣工(gong)命名大興(xing)城(cheng)(cheng),次年三月(yue)即正式遷入(ru)使(shi)用,前后僅九個月(yue),其建(jian)(jian)(jian)設速度之快(kuai)實令人驚嘆。整個工(gong)程的(de)規劃、設計、人力、物力的(de)組織(zhi)和(he)管(guan)理(li)都(dou)應是相當(dang)精(jing)細(xi)和(he)嚴(yan)謹(jin)的(de)。在規劃設計和(he)建(jian)(jian)(jian)設施(shi)工(gong)中,還(huan)得考慮地(di)形、水源、交通、軍(jun)事(shi)防御(yu)、環境(jing)美化、城(cheng)(cheng)市(shi)管(guan)理(li)、市(shi)場(chang)供需等的(de)配套,以及都(dou)城(cheng)(cheng)作為政(zheng)治、軍(jun)事(shi)、經濟、文化中心的(de)特點等諸多方面(mian)的(de)因素,解決一系列(lie)復(fu)雜(za)的(de)問(wen)題。因此大興(xing)城(cheng)(cheng)的(de)興(xing)建(jian)(jian)(jian)標志(zhi)著當(dang)時(shi)的(de)中國所(suo)達(da)到的(de)經濟和(he)科學技術水平。
有人(ren)曾列舉世(shi)界古代(dai)十座城(cheng)(cheng)市的面(mian)(mian)積(ji)(ji)(ji)進(jin)行比較:(1)隋大(da)(da)興城(cheng)(cheng)(唐長安城(cheng)(cheng)),583年(nian)(nian)(nian)建(jian),面(mian)(mian)積(ji)(ji)(ji)84.1平(ping)(ping)(ping)方(fang)(fang)(fang)(fang)(fang)公(gong)(gong)里(li);(2)北魏洛(luo)陽城(cheng)(cheng),493年(nian)(nian)(nian)擴建(jian),面(mian)(mian)積(ji)(ji)(ji)100平(ping)(ping)(ping)方(fang)(fang)(fang)(fang)(fang)公(gong)(gong)里(li);(3)明(ming)清北京(jing)城(cheng)(cheng),1421—1553年(nian)(nian)(nian)建(jian),面(mian)(mian)積(ji)(ji)(ji)60.2平(ping)(ping)(ping)方(fang)(fang)(fang)(fang)(fang)公(gong)(gong)里(li);(4)元大(da)(da)都,1267年(nian)(nian)(nian)建(jian),面(mian)(mian)積(ji)(ji)(ji)50平(ping)(ping)(ping)方(fang)(fang)(fang)(fang)(fang)公(gong)(gong)里(li);(5)隋唐東(dong)京(jing)(洛(luo)陽城(cheng)(cheng)),605年(nian)(nian)(nian)建(jian),面(mian)(mian)積(ji)(ji)(ji)45.2平(ping)(ping)(ping)方(fang)(fang)(fang)(fang)(fang)公(gong)(gong)里(li);(6)明(ming)南京(jing),1366年(nian)(nian)(nian)建(jian),面(mian)(mian)積(ji)(ji)(ji)43平(ping)(ping)(ping)方(fang)(fang)(fang)(fang)(fang)公(gong)(gong)里(li);(7)漢長安(內城(cheng)(cheng)),建(jian)于公(gong)(gong)元前202年(nian)(nian)(nian),面(mian)(mian)積(ji)(ji)(ji)35平(ping)(ping)(ping)方(fang)(fang)(fang)(fang)(fang)公(gong)(gong)里(li);(8)巴(ba)格達(da),800年(nian)(nian)(nian)建(jian),面(mian)(mian)積(ji)(ji)(ji)30.44平(ping)(ping)(ping)方(fang)(fang)(fang)(fang)(fang)公(gong)(gong)里(li);(9)羅(luo)馬,300年(nian)(nian)(nian)建(jian),面(mian)(mian)積(ji)(ji)(ji)13.68平(ping)(ping)(ping)方(fang)(fang)(fang)(fang)(fang)公(gong)(gong)里(li);(10)拜占庭,447年(nian)(nian)(nian)建(jian),面(mian)(mian)積(ji)(ji)(ji)11.99平(ping)(ping)(ping)方(fang)(fang)(fang)(fang)(fang)公(gong)(gong)里(li)。從上所列可(ke)以看到,中國古代(dai)都市的規模之(zhi)大(da)(da)在世(shi)界上是無與倫比的。
大(da)興城(cheng)(cheng)的(de)規劃(hua)吸取了曹魏鄴城(cheng)(cheng)(故址在(zai)今河北(bei)臨漳鄴鎮東)、北(bei)魏洛陽(yang)城(cheng)(cheng)的(de)經驗,在(zai)方整(zheng)對稱(cheng)的(de)原則下,沿(yan)著南(nan)北(bei)中(zhong)軸(zhou)線,將宮(gong)城(cheng)(cheng)和皇(huang)城(cheng)(cheng)置于(yu)(yu)全城(cheng)(cheng)的(de)主要地位,郭(guo)城(cheng)(cheng)則圍繞在(zai)宮(gong)城(cheng)(cheng)和皇(huang)城(cheng)(cheng)的(de)東、西(xi)、南(nan)三面。分(fen)(fen)區整(zheng)齊(qi)明確,象征(zheng)著皇(huang)權的(de)威(wei)嚴(yan),充分(fen)(fen)體現了中(zhong)國(guo)古代(dai)京都規劃(hua)和布(bu)局(ju)(ju)的(de)獨特(te)風(feng)格(ge),反映了統治者專制集權的(de)思想(xiang)(xiang)和要求。特(te)別是把宮(gong)室、官署區與居住區嚴(yan)格(ge)分(fen)(fen)開,是一(yi)大(da)創(chuang)新。北(bei)宋呂大(da)防在(zai)《隋都城(cheng)(cheng)圖》題記中(zhong),曾稱(cheng)贊大(da)興城(cheng)(cheng)的(de)布(bu)局(ju)(ju)思想(xiang)(xiang):“隋氏設都,雖不(bu)能盡(jin)循先王之(zhi)法,然畦分(fen)(fen)棋布(bu),閭(lv)巷皆中(zhong)繩(sheng)墨,坊有(you)墉,墉有(you)門(men),逋亡奸偽無(wu)所容足。而朝廷官寺,居民市區不(bu)復(fu)相參(can),亦一(yi)代(dai)之(zhi)精制也。”清代(dai)徐松(song)也說:“自(zi)兩(liang)漢以(yi)(yi)后,至于(yu)(yu)晉、齊(qi)、梁(liang)、陳,并有(you)人家在(zai)宮(gong)闕之(zhi)間。隋文(wen)帝(di)以(yi)(yi)為不(bu)便于(yu)(yu)事,于(yu)(yu)是皇(huang)城(cheng)(cheng)之(zhi)內惟列府寺,不(bu)使雜居,公(gong)私有(you)辨,風(feng)俗齊(qi)整(zheng),實隋文(wen)之(zhi)新意也。”
在大(da)興城(cheng)的(de)規(gui)劃(hua)和興建中,對于(yu)環境(jing)美化和給排(pai)水(shui)問(wen)題(ti),也給予了(le)高度(du)的(de)重視。整個城(cheng)址位于(yu)渭水(shui)南(nan)(nan)岸,西傍(bang)灃河,東依灞水(shui)、浐水(shui),南(nan)(nan)對終南(nan)(nan)山。根據其地(di)理環境(jing)和河道情況,開鑿了(le)三條水(shui)渠引水(shui)入城(cheng)。城(cheng)南(nan)(nan)為永安渠和清明(ming)渠,城(cheng)東為龍(long)首(shou)渠,龍(long)首(shou)渠又分出兩條支渠。三條水(shui)渠都(dou)分別流經宮苑(yuan)再注入渭水(shui),不但(dan)可(ke)(ke)以解決(jue)給排(pai)水(shui)問(wen)題(ti),而且可(ke)(ke)以進行生活物資的(de)運(yun)輸。水(shui)渠兩岸種植有(you)柳樹,形成了(le)“渠柳條條水(shui)面齊”的(de)宜人(ren)景色。城(cheng)東南(nan)(nan)還(huan)開辟有(you)曲(qu)江“芙蓉園”,其“花卉周環,煙水(shui)明(ming)媚(mei),都(dou)人(ren)游賞(shang)盛(sheng)于(yu)中秋節。江側菰蒲(pu)蔥翠,柳蔭四合,碧波紅蕖(qu),湛然可(ke)(ke)愛”,是全城(cheng)的(de)風景區(qu)和旅游區(qu)。
在大興城的規劃、設計中,也還存在著嚴重的缺陷。其突(tu)出者(zhe)有三:
其(qi)一是沒有很好地考(kao)慮當時社會發展的需求,城(cheng)市規模過大,超越了時代的要(yao)求。其(qi)城(cheng)南(nan)(nan)四列里坊(fang)(fang),經過隋唐兩代三(san)百多(duo)年的時間,始終(zhong)沒有多(duo)少(shao)住戶,非常冷落荒(huang)涼。正如宋敏求所說:“自(zi)(zi)朱雀(que)門南(nan)(nan)第六橫(heng)街以(yi)南(nan)(nan),率無居人第宅(zhai)。”其(qi)注又云:“自(zi)(zi)興(xing)善寺以(yi)南(nan)(nan)四坊(fang)(fang),東西盡郭,雖有居者,煙(yan)火(huo)不(bu)接,耕墾種植,阡(qian)陌相(xiang)連。”
其(qi)二是大(da)(da)興城的道路(lu)(lu)雖(sui)然很寬,但(dan)全是土路(lu)(lu),雨雪時泥(ni)濘(ning)不堪,難以通行,有(you)時連上(shang)朝都(dou)得停(ting)止。為(wei)了(le)排水(shui),路(lu)(lu)面都(dou)是中間較(jiao)高,兩側(ce)有(you)寬、深各(ge)兩米多的水(shui)溝,但(dan)由于城內地形起伏較(jiao)大(da)(da),排水(shui)仍有(you)困(kun)難,以致(zhi)暴(bao)雨后常(chang)有(you)坊(fang)墻倒塌,居民(min)溺(ni)死的事故發生(sheng)。
其三是在(zai)漕運(yun)方面也存在(zai)著(zhu)較(jiao)大的問題。有時漕運(yun)不通,即造成(cheng)糧食供應匱乏(fa)。為(wei)此(ci),終于釀成(cheng)了都城的東遷。
在當時的(de)社會、經濟、科技條件下,大(da)(da)興(xing)城(cheng)(cheng)有如(ru)此(ci)規模的(de)建(jian)(jian)設(she)(she)和成(cheng)就,是(shi)(shi)值得(de)人們贊(zan)頌的(de)。大(da)(da)興(xing)城(cheng)(cheng)的(de)設(she)(she)計和布(bu)局思想,不但對中國(guo)后世(shi)的(de)都市建(jian)(jian)設(she)(she)有著(zhu)很大(da)(da)的(de)影響(xiang),而(er)且對日(ri)本、朝鮮的(de)都市建(jian)(jian)設(she)(she)也有著(zhu)深刻的(de)影響(xiang)。如(ru)日(ri)本飛(fei)鳥、奈良(liang)時代(dai)的(de)都城(cheng)(cheng)藤(teng)原(yuan)京、平城(cheng)(cheng)京,就是(shi)(shi)仿效大(da)(da)興(xing)城(cheng)(cheng)的(de)布(bu)局特(te)點而(er)建(jian)(jian)造的(de)。平城(cheng)(cheng)京東西(xi)三十二(er)町(ding)(ding),南(nan)北(bei)(bei)三十六町(ding)(ding),每隔四(si)町(ding)(ding)均有大(da)(da)路相通(tong),形(xing)成(cheng)整齊有序的(de)棋盤狀。宮城(cheng)(cheng)也是(shi)(shi)位于城(cheng)(cheng)北(bei)(bei)正(zheng)中,四(si)周(zhou)以官衙和貴族邸第圍繞(rao),明(ming)顯地體現(xian)著(zhu)大(da)(da)興(xing)城(cheng)(cheng)的(de)特(te)征。
又謂“新都(dou)(dou)”。是隋(sui)唐時期僅僅次于(yu)大興(長安(an))的城(cheng)(cheng)市它(ta)位于(yu)漢魏(wei)洛陽城(cheng)(cheng)之(zhi)西(xi)約十公里,北依邙山,南(nan)對龍(long)門,地理位置十分(fen)優(you)越。正如李吉(ji)甫(fu)所說:“北據邙山,南(nan)直伊闕(que)之(zhi)口,洛水(shui)貫(guan)之(zhi),有河漢之(zhi)象,東(dong)去故城(cheng)(cheng)一十八里。”由(you)于(yu)水(shui)陸交通(tong)方便,自隋(sui)代至北宋,一直作為都(dou)(dou)城(cheng)(cheng),成為一個政治、經濟和交通(tong)的中心。
東(dong)京(jing)的(de)營(ying)建是一(yi)個浩大(da)(da)的(de)工(gong)程(cheng)。據《隋書(shu)(shu)·食貨(huo)志(zhi)》記(ji)(ji)(ji)載(zai):“始建東(dong)都(dou),以(yi)尚(shang)書(shu)(shu)令楊素為營(ying)作大(da)(da)監,每月役(yi)丁二百(bai)萬(wan)人(ren)。”《大(da)(da)業雜記(ji)(ji)(ji)》中(zhong)記(ji)(ji)(ji)載(zai):“初(chu)衛(wei)尉劉權(quan)、秘書(shu)(shu)丞(cheng)韋萬(wan)頃總監筑宮城(cheng),一(yi)時布兵(bing)夫,周(zhou)匝(za)四面,有(you)(you)七十(shi)(shi)(shi)萬(wan)人(ren)。城(cheng)周(zhou)匝(za)兩重(zhong),延(yan)袤三(san)十(shi)(shi)(shi)余里(li)(li),高(gao)四十(shi)(shi)(shi)六(liu)尺。六(liu)十(shi)(shi)(shi)日(ri)成。其內諸殿基及(ji)諸墻院,又役(yi)十(shi)(shi)(shi)余萬(wan)人(ren)。直東(dong)都(dou)土(tu)工(gong)監常(chang)役(yi)八十(shi)(shi)(shi)萬(wan)人(ren),其木工(gong)、瓦(wa)工(gong)、金工(gong)、石工(gong)又役(yi)十(shi)(shi)(shi)余萬(wan)人(ren)。”唐初(chu)張玄素曾對(dui)唐太宗言及(ji)他所(suo)見營(ying)建東(dong)都(dou)的(de)情(qing)況,說:“臣又嘗(chang)見隋室造殿,楹棟(dong)宏壯,大(da)(da)木非隨近所(suo)有(you)(you),多從豫章(今江(jiang)西境)采(cai)來。二千人(ren)曳一(yi)柱,其下施轂,皆以(yi)生鐵為之,若(ruo)用(yong)(yong)木輪,便即火出。鐵轂既(ji)生,行(xing)一(yi)二里(li)(li)即有(you)(you)破壞,仍數(shu)百(bai)人(ren)別赍鐵轂以(yi)隨之,終日(ri)不(bu)過(guo)進(jin)三(san)二十(shi)(shi)(shi)里(li)(li)。略計一(yi)柱,已用(yong)(yong)數(shu)十(shi)(shi)(shi)萬(wan)功(gong),則(ze)余費(fei)又過(guo)于此。”從這些(xie)記(ji)(ji)(ji)載(zai),可以(yi)看到其用(yong)(yong)工(gong)量的(de)大(da)(da)致狀(zhuang)況。建造大(da)(da)興(xing)城(cheng)的(de)用(yong)(yong)工(gong)狀(zhuang)況,雖缺(que)乏(fa)史料記(ji)(ji)(ji)載(zai),但(dan)參照(zhao)有(you)(you)關東(dong)京(jing)的(de)記(ji)(ji)(ji)載(zai),當與東(dong)京(jing)的(de)用(yong)(yong)工(gong)數(shu)量相當。
東京規(gui)(gui)模略小于大(da)興城(cheng)(cheng)(cheng)。據勘探(tan),它(ta)的東城(cheng)(cheng)(cheng)墻(qiang)長(chang)7312米(mi)(mi)(mi),南(nan)城(cheng)(cheng)(cheng)墻(qiang)長(chang)7290米(mi)(mi)(mi),北(bei)(bei)城(cheng)(cheng)(cheng)墻(qiang)長(chang)6138米(mi)(mi)(mi),西城(cheng)(cheng)(cheng)墻(qiang)長(chang)6776米(mi)(mi)(mi),總(zong)計周(zhou)長(chang)27516米(mi)(mi)(mi),合55里。平面呈(cheng)南(nan)寬北(bei)(bei)窄的不(bu)規(gui)(gui)則長(chang)方形。全城(cheng)(cheng)(cheng)亦是由(you)宮城(cheng)(cheng)(cheng)、皇城(cheng)(cheng)(cheng)、郭(guo)城(cheng)(cheng)(cheng)所構成。洛水由(you)西而(er)東穿城(cheng)(cheng)(cheng)而(er)過(guo),把城(cheng)(cheng)(cheng)分為南(nan)北(bei)(bei)二區。由(you)于地形的關系,東京不(bu)似(si)大(da)興城(cheng)(cheng)(cheng)那(nei)樣強調(diao)南(nan)北(bei)(bei)中軸(zhou)線和(he)完(wan)全對稱的布(bu)局方式,其宮城(cheng)(cheng)(cheng)和(he)皇城(cheng)(cheng)(cheng)建于西北(bei)(bei)部,但整(zheng)個規(gui)(gui)劃力求方正、整(zheng)齊,仍與大(da)興城(cheng)(cheng)(cheng)相似(si)。
東京洛陽城(cheng)的營建(jian)
開鑿廣通渠工程
營建東京是宇(yu)文(wen)愷在城(cheng)市建設(she)方面的(de)另一個重大成就。開(kai)皇四年(584年)六月(yue),宇(yu)文(wen)愷又受命(ming)負責開(kai)鑿(zao)廣(guang)通(tong)渠工程。據記載:“隋主以渭水多沙,深淺(qian)不常,漕者苦(ku)之”,“詔太(tai)子(zi)左庶子(zi)宇(yu)文(wen)愷帥水工鑿(zao)渠,引渭水,自大興城(cheng)東至潼關(guan)(guan)三百余(yu)里,名曰廣(guang)通(tong)渠。漕運通(tong)利,關(guan)(guan)內賴之。”其后,宇(yu)文(wen)愷出任(ren)萊州(zhou)(今(jin)山東掖縣)刺史,“甚有能名”。
開皇六(liu)年(nian)閏八月,宇文愷(kai)之(zhi)二兄上柱國(guo)(guo)、杞國(guo)(guo)公宇文忻因謀反被誅,宇文愷(kai)也(ye)受株(zhu)連(lian)而解(jie)職(zhi),“除名于(yu)家,久不得(de)調”。
宮(gong)(gong)城(cheng)(cheng)名紫微城(cheng)(cheng),宮(gong)(gong)城(cheng)(cheng)位于南北(bei)中軸線(xian)的(de)(de)(de)北(bei)部(bu),“東(dong)(dong)西(xi)四(si)(si)(si)里一百(bai)八(ba)(ba)十(shi)八(ba)(ba)步(bu),南北(bei)二(er)(er)里八(ba)(ba)十(shi)五步(bu),周一十(shi)三里二(er)(er)百(bai)四(si)(si)(si)十(shi)一步(bu),其(qi)崇四(si)(si)(si)丈(zhang)八(ba)(ba)尺(chi),以(yi)(yi)象北(bei)辰藩衛(wei)。實測東(dong)(dong)西(xi)長2820.3米(含掖(ye)(ye)庭宮(gong)(gong)),南北(bei)寬1492.1米。城(cheng)(cheng)內(nei)有(you)墻把宮(gong)(gong)城(cheng)(cheng)分隔成三部(bu)分。宮(gong)(gong)城(cheng)(cheng)內(nei)有(you)乾陽殿(dian)(dian)(dian)、大業(ye)殿(dian)(dian)(dian)等(deng)數(shu)十(shi)座殿(dian)(dian)(dian)、閣(ge)、堂、院,極其(qi)富麗(li)堂皇(huang)。中部(bu)是大興(xing)宮(gong)(gong),由大興(xing)殿(dian)(dian)(dian)等(deng)數(shu)十(shi)座殿(dian)(dian)(dian)臺樓(lou)(lou)閣(ge)組成,是皇(huang)帝(di)(di)起居、聽政的(de)(de)(de)場所(suo)。東(dong)(dong)部(bu)為(wei)東(dong)(dong)宮(gong)(gong),專供太(tai)(tai)子(zi)居住和辦理政務。西(xi)部(bu)為(wei)掖(ye)(ye)庭宮(gong)(gong),是安(an)置宮(gong)(gong)女(nv)學習技(ji)藝的(de)(de)(de)地方(fang)。李吉甫稱:“(東(dong)(dong)京(jing))宮(gong)(gong)室(shi)臺殿(dian)(dian)(dian),皆宇文愷所(suo)創(chuang)也。愷巧思絕倫,因此制(zhi)造頗窮奢麗(li),前代(dai)都(dou)邑莫之(zhi)(zhi)比焉。”其(qi)中以(yi)(yi)乾陽殿(dian)(dian)(dian)最為(wei)奢華(hua),是皇(huang)帝(di)(di)舉行大典和接(jie)待重(zhong)要外國(guo)使團的(de)(de)(de)地方(fang)。“殿(dian)(dian)(dian)基(ji)高(gao)九尺(chi),從地至鴟尾(wei)(房脊兩端的(de)(de)(de)獸)高(gao)一百(bai)七十(shi)尺(chi),十(shi)三間二(er)(er)十(shi)九架,三陛軒(xuan)。文掍鏤檻(jian),欒櫨百(bai)重(zhong),楶拱千(qian)構,云楣(mei)繡柱,華(hua)榱璧珰,窮軒(xuan)甍(meng)之(zhi)(zhi)壯麗(li)。其(qi)柱大二(er)(er)十(shi)四(si)(si)(si)圍,倚井(jing)垂蓮,仰(yang)之(zhi)(zhi)者眩曜。南軒(xuan)垂以(yi)(yi)珠絲網絡,下不至地七尺(chi),以(yi)(yi)防飛鳥。四(si)(si)(si)面(mian)周以(yi)(yi)軒(xuan)廊,坐宿衛(wei)兵(bing)。”“殿(dian)(dian)(dian)庭東(dong)(dong)南西(xi)南各有(you)重(zhong)樓(lou)(lou),一懸鐘,一懸鼓(gu),刻漏即在樓(lou)(lou)下,隨(sui)刻漏則(ze)鳴鐘鼓(gu)。”宮(gong)(gong)城(cheng)(cheng)正門(men)則(ze)天門(men),“門(men)上飛觀相(xiang)夾,門(men)外即朝堂”。因其(qi)太(tai)(tai)奢,致武德四(si)(si)(si)年(nian)(621年(nian))唐高(gao)祖李淵令人焚毀(hui)另建。
形(xing)如偃月(yue),謂之月(yue)陂(po)
宮城西(xi)(xi)面是上(shang)林西(xi)(xi)苑,又名會通(tong)苑,在今洛(luo)(luo)(luo)陽(yang)澗西(xi)(xi)一(yi)帶(dai)。據《大業雜記》記載(zai):“(大業)元(yuan)(yuan)年夏五(wu)月西(xi)(xi)苑,周二百(bai)里(li),其內造十(shi)六院,屈(qu)曲繞(rao)龍鱗溝。”苑內引澗河匯水(shui)成海(hai),周十(shi)余里(li),海(hai)中造蓬萊、方丈、瀛洲三神山,高出水(shui)面百(bai)余尺,臺觀殿(dian)(dian)閣布置在山上(shang),風景非(fei)常(chang)壯觀。緣渠作(zuo)十(shi)六院,門皆臨渠,堂殿(dian)(dian)樓觀,極為(wei)華麗。為(wei)了(le)引洛(luo)(luo)(luo)水(shui)入苑,宇文愷還修筑(zhu)(zhu)了(le)月陂。據李吉甫(fu)《元(yuan)(yuan)和郡縣圖(tu)志》卷五(wu)記載(zai):“洛(luo)(luo)(luo)水(shui),在(洛(luo)(luo)(luo)陽(yang))縣西(xi)(xi)南(nan)三里(li)。西(xi)(xi)自苑內上(shang)陽(yang)之南(nan)彌漫東流,宇文愷筑(zhu)(zhu)斜堤束(shu)令東北流。當水(shui)沖(chong),捺堰九折(zhe),形如偃月,謂之月陂。”
宮(gong)城(cheng)(cheng)的(de)(de)東北(bei)面為含(han)嘉(jia)城(cheng)(cheng),城(cheng)(cheng)里為含(han)嘉(jia)倉,是一座貯藏糧(liang)食的(de)(de)大(da)型國家糧(liang)倉。據(ju)《大(da)業雜記》記載:“大(da)業元年(nian),煬(yang)帝建東都洛陽,在宮(gong)城(cheng)(cheng)東建含(han)嘉(jia)倉。”據(ju)1969年(nian)以來的(de)(de)考(kao)古發掘,含(han)嘉(jia)城(cheng)(cheng)的(de)(de)總面積約43萬平方米(mi),四面有城(cheng)(cheng)墻(qiang),城(cheng)(cheng)墻(qiang)為挖槽夯筑而(er)成。在倉城(cheng)(cheng)的(de)(de)東北(bei)和偏(pian)南地區(qu),勘探出大(da)小(xiao)不等(deng)的(de)(de)圓形(xing)或橢圓形(xing)的(de)(de)地下糧(liang)窖(jiao)287座,估計全城(cheng)(cheng)的(de)(de)地下糧(liang)窖(jiao)應(ying)在400座以上。由于東京漕(cao)運方便,又在含(han)嘉(jia)城(cheng)(cheng)內儲藏了(le)大(da)量糧(liang)食,避免(mian)了(le)大(da)興城(cheng)(cheng)發生糧(liang)荒的(de)(de)問題(ti),使其糧(liang)食供應(ying)得到了(le)保(bao)障。
皇(huang)城(cheng)(cheng)(cheng)名太微城(cheng)(cheng)(cheng)(又稱(cheng)子城(cheng)(cheng)(cheng)),亦(yi)稱(cheng)南(nan)(nan)城(cheng)(cheng)(cheng)、寶城(cheng)(cheng)(cheng),在(zai)宮(gong)城(cheng)(cheng)(cheng)南(nan)(nan)面,由一條橫街(jie)與(yu)宮(gong)城(cheng)(cheng)(cheng)相(xiang)隔(ge),“東(dong)(dong)西(xi)五里一十(shi)(shi)(shi)七(qi)(qi)步(bu),南(nan)(nan)北三(san)里二百九(jiu)(jiu)十(shi)(shi)(shi)八(ba)步(bu),周一十(shi)(shi)(shi)三(san)里二百五十(shi)(shi)(shi)步(bu),高三(san)丈七(qi)(qi)尺(chi)。實測東(dong)(dong)西(xi)長與(yu)宮(gong)城(cheng)(cheng)(cheng)相(xiang)同,南(nan)(nan)北寬為1843.6米。其(qi)城(cheng)(cheng)(cheng)曲折,以象南(nan)(nan)宮(gong)垣”。皇(huang)城(cheng)(cheng)(cheng)是軍政機構和宗廟的(de)所在(zai)地(di)。“城(cheng)(cheng)(cheng)中南(nan)(nan)北七(qi)(qi)街(jie),東(dong)(dong)西(xi)五街(jie)。左宗廟,右社(she)稷(ji)。百僚廨署列于其(qi)間,凡(fan)省六,寺(si)九(jiu)(jiu),臺(tai)一,監四,衛十(shi)(shi)(shi)有八(ba)。東(dong)(dong)宮(gong)官屬,凡(fan)府一,坊(fang)三(san),寺(si)三(san),率府十(shi)(shi)(shi)”。
郭城(cheng)(cheng)(cheng)稱羅(luo)郭城(cheng)(cheng)(cheng)、羅(luo)城(cheng)(cheng)(cheng)、京城(cheng)(cheng)(cheng),隋時僅筑有短(duan)垣,一(yi)(yi)(yi)說:“東西(xi)一(yi)(yi)(yi)十(shi)(shi)八(ba)里(li)一(yi)(yi)(yi)百(bai)(bai)一(yi)(yi)(yi)十(shi)(shi)五步(bu),南(nan)(nan)北(bei)一(yi)(yi)(yi)十(shi)(shi)五里(li)一(yi)(yi)(yi)百(bai)(bai)七(qi)十(shi)(shi)五步(bu),周(zhou)六十(shi)(shi)七(qi)里(li),其崇一(yi)(yi)(yi)丈八(ba)尺(chi)”,實測東西(xi)長(chang)(chang)9721 米(mi),南(nan)(nan)北(bei)寬8651.7米(mi)。全城(cheng)(cheng)(cheng)由(you)南(nan)(nan)北(bei)向大(da)街(jie)(jie)(jie)十(shi)(shi)一(yi)(yi)(yi)條(tiao),東西(xi)向大(da)街(jie)(jie)(jie)十(shi)(shi)四條(tiao),劃(hua)分(fen)為一(yi)(yi)(yi)百(bai)(bai)零八(ba)個里(li)坊和兩(liang)個商市,形(xing)成棋(qi)盤(pan)型的布(bu)局(ju)。白(bai)居易有詩云(yun):“百(bai)(bai)千(qian)家似圍棋(qi)局(ju),十(shi)(shi)二街(jie)(jie)(jie)如種菜畦。”既形(xing)象又(you)貼切地描繪了大(da)興城(cheng)(cheng)(cheng)的布(bu)局(ju)特征(zheng)。二說:“東西(xi)五千(qian)六百(bai)(bai)十(shi)(shi)步(bu),南(nan)(nan)北(bei)五千(qian)四百(bai)(bai)七(qi)十(shi)(shi)步(bu)”,實測南(nan)(nan)北(bei)最(zui)長(chang)(chang)處7312米(mi),東西(xi)最(zui)寬處7290米(mi)。全城(cheng)(cheng)(cheng)縱(zong)橫大(da)街(jie)(jie)(jie)各十(shi)(shi)條(tiao),一(yi)(yi)(yi)般(ban)寬41米(mi),把全城(cheng)(cheng)(cheng)劃(hua)分(fen)為“里(li)一(yi)(yi)(yi)百(bai)(bai)三,市三”。這(zhe)(zhe)些里(li)坊分(fen)布(bu)在北(bei)區的東部和整個南(nan)(nan)區,其中南(nan)(nan)區的里(li)坊與街(jie)(jie)(jie)道(dao)最(zui)整齊。里(li)坊平面作方形(xing)或長(chang)(chang)方形(xing),面積比(bi)大(da)興城(cheng)(cheng)(cheng)的里(li)坊略小(xiao),坊內辟十(shi)(shi)字(zi)形(xing)街(jie)(jie)(jie)道(dao)。由(you)于(yu)里(li)坊小(xiao)街(jie)(jie)(jie)道(dao)窄,臨(lin)街(jie)(jie)(jie)開門的住(zhu)宅隨之增(zeng)多,這(zhe)(zhe)樣就使城(cheng)(cheng)(cheng)內各部分(fen)的關系顯(xian)得比(bi)較緊湊。
城(cheng)(cheng)中(zhong)的(de)(de)(de)街(jie)道(dao)(dao)(dao)(dao)都(dou)很寬(kuan)(kuan)(kuan)。通(tong)向城(cheng)(cheng)門的(de)(de)(de)街(jie)道(dao)(dao)(dao)(dao)之寬(kuan)(kuan)(kuan)度都(dou)在百米(mi)以上(shang);最寬(kuan)(kuan)(kuan)的(de)(de)(de)是(shi)界于(yu)宮城(cheng)(cheng)和(he)皇城(cheng)(cheng)之間的(de)(de)(de)橫(heng)街(jie),寬(kuan)(kuan)(kuan)達220米(mi)以上(shang);位于(yu)南北中(zhong)軸線上(shang)的(de)(de)(de)主干道(dao)(dao)(dao)(dao)朱(zhu)雀大(da)街(jie)寬(kuan)(kuan)(kuan)150 米(mi);不通(tong)城(cheng)(cheng)門的(de)(de)(de)街(jie)道(dao)(dao)(dao)(dao)寬(kuan)(kuan)(kuan)42—68米(mi);最窄的(de)(de)(de)是(shi)四(si)周沿城(cheng)(cheng)墻內側的(de)(de)(de)順城(cheng)(cheng)街(jie),寬(kuan)(kuan)(kuan)25米(mi)。里坊(fang)(fang)都(dou)筑有坊(fang)(fang)墻,坊(fang)(fang)中(zhong)也有街(jie)道(dao)(dao)(dao)(dao)。大(da)的(de)(de)(de)里坊(fang)(fang)四(si)面開四(si)個坊(fang)(fang)門,中(zhong)辟(pi)十(shi)字(zi)街(jie);小(xiao)的(de)(de)(de)里坊(fang)(fang)開東西二(er)門,有一條(tiao)橫(heng)街(jie)。這些縱橫(heng)相交(jiao)(jiao)的(de)(de)(de)街(jie)道(dao)(dao)(dao)(dao)形成(cheng)一個交(jiao)(jiao)通(tong)網絡,井然(ran)有序。各大(da)街(jie)的(de)(de)(de)兩側都(dou)開有排水溝,街(jie)道(dao)(dao)(dao)(dao)兩旁植以榆(yu)、槐為主的(de)(de)(de)行(xing)道(dao)(dao)(dao)(dao)樹,株(zhu)行(xing)距整齊劃一,使道(dao)(dao)(dao)(dao)路成(cheng)為寬(kuan)(kuan)(kuan)廣筆(bi)直的(de)(de)(de)林蔭大(da)道(dao)(dao)(dao)(dao),為城(cheng)(cheng)市增(zeng)添了風采。
大興宮(gong)(gong)的(de)(de)(de)建造布(bu)局天(tian)人合一,從(cong)六(liu)坡的(de)(de)(de)高度(du)看,地(di)勢從(cong)北(bei)(bei)到南漸次降低。那么宮(gong)(gong)城所處的(de)(de)(de)位置則(ze)相(xiang)對較低。不把宮(gong)(gong)城設置在最(zui)(zui)高處另有(you)原委。根據天(tian)上(shang)星(xing)宿的(de)(de)(de)位置,最(zui)(zui)為(wei)尊貴的(de)(de)(de)紫(zi)薇(wei)宮(gong)(gong)居于北(bei)(bei)天(tian)中央,它以北(bei)(bei)極為(wei)中樞,東、西兩藩(fan)共有(you)十五顆(ke)星(xing)環抱著(zhu)它。紫(zi)薇(wei)宮(gong)(gong)即皇(huang)(huang)(huang)宮(gong)(gong)的(de)(de)(de)意(yi)思,皇(huang)(huang)(huang)帝貴為(wei)天(tian)子,地(di)上(shang)的(de)(de)(de)君主和天(tian)上(shang)的(de)(de)(de)星(xing)宿應該(gai)相(xiang)對應,應此,只(zhi)能(neng)把皇(huang)(huang)(huang)宮(gong)(gong)布(bu)置在北(bei)(bei)邊(bian)中央位置。而且北(bei)(bei)有(you)渭河相(xiang)倚,從(cong)防衛角度(du)看,也(ye)具安全性(xing)。
但是這種(zhong)追(zhui)求理念的(de)設計似(si)乎也有缺陷。隋代(dai)的(de)皇宮(gong)——大(da)(da)(da)興(xing)宮(gong)到唐(tang)(tang)朝繼(ji)續沿用(yong),只是改名太(tai)極宮(gong)。而太(tai)極宮(gong)很快就被大(da)(da)(da)明(ming)宮(gong)所取代(dai),究其原因,就是應為(wei)(wei)(wei)太(tai)極宮(gong)地(di)勢較低,而長(chang)安城盛夏(xia)(xia)氣溫很高,使得住在太(tai)極宮(gong)有“湫濕感”。為(wei)(wei)(wei)此從秦至(zhi)唐(tang)(tang),每逢夏(xia)(xia)季,統治(zhi)者都要到夏(xia)(xia)宮(gong)去避(bi)暑。唐(tang)(tang)太(tai)宗選定(ding)長(chang)安城北(bei)禁苑中(zhong)龍(long)首高地(di),營造大(da)(da)(da)明(ming)宮(gong),為(wei)(wei)(wei)太(tai)上皇消夏(xia)(xia)的(de)夏(xia)(xia)宮(gong)。后(hou)來唐(tang)(tang)高宗李(li)治(zhi)又接(jie)著以為(wei)(wei)(wei)完成的(de)大(da)(da)(da)明(ming)宮(gong)為(wei)(wei)(wei)基(ji)礎,進(jin)行大(da)(da)(da)規模的(de)再建工程(cheng)。大(da)(da)(da)明(ming)宮(gong)的(de)正殿含元殿建成后(hou),唐(tang)(tang)高宗便正式在大(da)(da)(da)明(ming)宮(gong)聽政。此后(hou)二百余年(nian),大(da)(da)(da)明(ming)宮(gong)都是唐(tang)(tang)代(dai)主(zhu)要的(de)朝會之(zhi)所,成為(wei)(wei)(wei)唐(tang)(tang)王朝的(de)統治(zhi)中(zhong)心和國(guo)家象(xiang)征。
宇文愷的(de)(de)(de)(de)一(yi)生,主要是(shi)(shi)(shi)(shi)擔任營(ying)造方面(mian)的(de)(de)(de)(de)高級官(guan)員,主持(chi)過(guo)許(xu)多大(da)型的(de)(de)(de)(de)建(jian)(jian)筑工(gong)程(cheng),起(qi)著相當于工(gong)程(cheng)總指揮、總設(she)計(ji)師和(he)(he)總工(gong)程(cheng)師的(de)(de)(de)(de)作用。他在(zai)建(jian)(jian)筑方面(mian)取得了許(xu)多重大(da)的(de)(de)(de)(de)成就,有(you)(you)(you)些(xie)成就甚(shen)至(zhi)具(ju)有(you)(you)(you)劃時(shi)代的(de)(de)(de)(de)意(yi)義。但也(ye)應該指出的(de)(de)(de)(de)是(shi)(shi)(shi)(shi),在(zai)他設(she)計(ji)和(he)(he)主持(chi)的(de)(de)(de)(de)工(gong)程(cheng)中,除(chu)了開鑿(zao)廣通渠,客觀上(shang)有(you)(you)(you)利于國計(ji)民生外(wai),其余(yu)大(da)多是(shi)(shi)(shi)(shi)為(wei)了滿足統治者(zhe)(zhe)的(de)(de)(de)(de)統治需要,尤(you)其是(shi)(shi)(shi)(shi)宮殿建(jian)(jian)筑,不顧勞(lao)民傷財,取悅帝王。如營(ying)造仁壽宮時(shi),“役(yi)使嚴急,丁(ding)夫(fu)多死,疲頓(dun)顛仆,推填坑坎,覆以土(tu)石,因而(er)筑為(wei)平(ping)地。死者(zhe)(zhe)以萬(wan)數”,“時(shi)天(tian)暑,役(yi)夫(fu)死者(zhe)(zhe)相次于道(dao),楊素(su)悉焚除(chu)之(zhi)”。營(ying)建(jian)(jian)東(dong)京時(shi),他“揣(chuai)帝心在(zai)宏侈,于是(shi)(shi)(shi)(shi)東(dong)京制度窮極壯(zhuang)麗”。“東(dong)京官(guan)吏(li)督役(yi)嚴急,役(yi)丁(ding)死者(zhe)(zhe)什四五,所(suo)司以車載(zai)死丁(ding),東(dong)至(zhi)城皋(gao)(今(jin)河南滎陽),北至(zhi)河陽(今(jin)河南孟縣南),相望于道(dao)”。長城之(zhi)役(yi),“死者(zhe)(zhe)十五六”。建(jian)(jian)仁壽宮和(he)(he)東(dong)京的(de)(de)(de)(de)工(gong)程(cheng),宇文愷雖(sui)掛的(de)(de)(de)(de)是(shi)(shi)(shi)(shi)副(fu)職,但他是(shi)(shi)(shi)(shi)實(shi)際的(de)(de)(de)(de)負責者(zhe)(zhe),因此功(gong)過(guo)與他都有(you)(you)(you)直接的(de)(de)(de)(de)關系。