長樂宮(gong)遺址(zhi)即現在的(de)未央(yang)區(qu)閣老門、唐寨(zhai)、張家巷(xiang)、羅寨(zhai)、講武殿、中查、西查、東查，樊寨(zhai)和雷寨(zhai)等(deng)村(cun)莊。
長(chang)(chang)樂(le)宮(gong)的考古工作(zuo)開始于1956年(nian)。經勘(kan)查，該宮(gong)平(ping)面形狀(zhuang)不規整，周長(chang)(chang)約10千(qian)米(mi)，面積約6平(ping)方千(qian)米(mi)，占長(chang)(chang)安城(cheng)總面積的六分之一左右(you)。宮(gong)墻(qiang)四門(men)遺跡尚能(neng)辨認，宮(gong)內建筑已完(wan)全湮滅(mie)，只有長(chang)(chang)信宮(gong)、長(chang)(chang)秋宮(gong)等少數宮(gong)室，可據出(chu)土物(wu)印證。通過發掘表明，長(chang)(chang)樂(le)宮(gong)在東漢還保存完(wan)好，五(wu)代(dai)十國以后廢(fei)棄。
長(chang)(chang)樂宮遺址曾出土(tu)罕見排(pai)(pai)水(shui)渠(qu)道(dao)(dao)，在一(yi)米多深(shen)的(de)(de)(de)(de)地下，兩(liang)(liang)組陶(tao)質(zhi)排(pai)(pai)水(shui)管道(dao)(dao)如兩(liang)(liang)條南(nan)北向的(de)(de)(de)(de)巨龍“聚(ju)首”在一(yi)條長(chang)(chang)達五十(shi)七(qi)米的(de)(de)(de)(de)排(pai)(pai)水(shui)渠(qu)邊(bian)。而排(pai)(pai)水(shui)渠(qu)道(dao)(dao)由一(yi)條排(pai)(pai)水(shui)渠(qu)和(he)(he)長(chang)(chang)短不(bu)一(yi)、粗(cu)細不(bu)均(jun)的(de)(de)(de)(de)五角形排(pai)(pai)水(shui)管道(dao)(dao)共同構成。排(pai)(pai)水(shui)渠(qu)長(chang)(chang)達五十(shi)七(qi)米，寬(kuan)約一(yi)點八米，深(shen)約一(yi)點五米，在接(jie)納了(le)來自南(nan)方(fang)和(he)(he)東方(fang)的(de)(de)(de)(de)各(ge)個排(pai)(pai)水(shui)管道(dao)(dao)的(de)(de)(de)(de)污水(shui)之(zhi)后(hou)，便向西北方(fang)向流去。這(zhe)從側面(mian)表明了(le)西漢時期(qi)中國皇宮具有較高(gao)的(de)(de)(de)(de)建筑水(shui)平。
經過(guo)多(duo)年的(de)(de)(de)(de)考(kao)古勘探和(he)發(fa)(fa)掘(jue)，長樂宮(gong)(gong)的(de)(de)(de)(de)布局、范圍(wei)日漸清晰(xi)，并(bing)且與文(wen)獻(xian)中的(de)(de)(de)(de)記載(zai)相互印(yin)(yin)證。整個宮(gong)(gong)城占(zhan)地(di)面積約6平方公里，約占(zhan)全城總面積的(de)(de)(de)(de)六(liu)分之一，四周建(jian)有(you)(you)(you)圍(wei)墻(qiang)。2003年發(fa)(fa)掘(jue)的(de)(de)(de)(de)四號(hao)宮(gong)(gong)殿（據考(kao)古研究為臨華殿）遺(yi)址(zhi)有(you)(you)(you)2000平方米(mi)，房子為半地(di)穴式，鵝卵石鋪(pu)地(di)后(hou)(hou)砂漿抹(mo)平地(di)面，墻(qiang)壁(bi)(bi)涂有(you)(you)(you)白灰，并(bing)飾有(you)(you)(you)奪目(mu)的(de)(de)(de)(de)彩(cai)繪壁(bi)(bi)畫，通(tong)(tong)道和(he)臺(tai)(tai)階鋪(pu)有(you)(you)(you)精美的(de)(de)(de)(de)印(yin)(yin)花磚(zhuan)，顯示出(chu)獨特的(de)(de)(de)(de)審美取(qu)向。而后(hou)(hou)發(fa)(fa)掘(jue)出(chu)的(de)(de)(de)(de)五號(hao)宮(gong)(gong)殿遺(yi)址(zhi)形(xing)制(zhi)獨特，遺(yi)址(zhi)圍(wei)墻(qiang)特別厚。專(zhuan)(zhuan)家(jia)們推(tui)測(ce)這(zhe)里就是用(yong)來(lai)儲藏冰的(de)(de)(de)(de)“凌室(shi)”，厚厚的(de)(de)(de)(de)墻(qiang)壁(bi)(bi)有(you)(you)(you)利于保(bao)持室(shi)溫，所藏之冰用(yong)來(lai)儲藏食物、防(fang)腐保(bao)鮮和(he)降溫納涼(liang)。考(kao)古工(gong)作(zuo)者發(fa)(fa)掘(jue)的(de)(de)(de)(de)長樂宮(gong)(gong)內規模(mo)較大(da)的(de)(de)(de)(de)六(liu)號(hao)宮(gong)(gong)殿遺(yi)址(zhi)，它的(de)(de)(de)(de)中心是一座大(da)型夯(hang)(hang)土臺(tai)(tai)基，東西長約160米(mi)，南北殘寬(kuan)50余米(mi)，建(jian)筑布局有(you)(you)(you)序、結構精巧，出(chu)土了(le)(le)大(da)量的(de)(de)(de)(de)建(jian)筑構件。據考(kao)證，這(zhe)處(chu)規模(mo)宏偉的(de)(de)(de)(de)建(jian)筑很(hen)可能就是長樂宮(gong)(gong)前殿遺(yi)址(zhi)。除了(le)(le)房屋、水井、院落(luo)外，緊貼夯(hang)(hang)土臺(tai)(tai)基的(de)(de)(de)(de)一條(tiao)長34.29米(mi)、最(zui)寬(kuan)處(chu)1.9米(mi)的(de)(de)(de)(de)半地(di)下通(tong)(tong)道引發(fa)(fa)了(le)(le)諸多(duo)猜想。有(you)(you)(you)專(zhuan)(zhuan)家(jia)認為，這(zhe)條(tiao)地(di)下通(tong)(tong)道就是皇宮(gong)(gong)中的(de)(de)(de)(de)秘道，是皇族們預防(fang)不(bu)測(ce)的(de)(de)(de)(de)安全通(tong)(tong)道。
長(chang)樂(le)宮(gong)(gong)周圍筑有宮(gong)(gong)城(cheng)，由于(yu)長(chang)樂(le)宮(gong)(gong)是在秦興樂(le)宮(gong)(gong)基礎上修(xiu)建起來的缺乏系統規(gui)劃，平面不(bu)甚規(gui)整、為不(bu)規(gui)則(ze)的方形(xing)，尤(you)其南宮(gong)(gong)墻凹凸轉折(zhe)較多，宮(gong)(gong)城(cheng)四面各設一(yi)座宮(gong)(gong)門(men)，東門(men)和(he)西門(men)外有闕。
宮(gong)(gong)垣(yuan)東(dong)(dong)西(xi)(xi)長(chang)2900米(mi)，南(nan)北(bei)(bei)寬2400米(mi)，周(zhou)長(chang)10600米(mi)，占地面(mian)(mian)積約(yue)6平方公(gong)里(li)，約(yue)占漢長(chang)安城總面(mian)(mian)積的(de)1/6。宮(gong)(gong)城平面(mian)(mian)形(xing)制略(lve)呈方形(xing)，南(nan)墻(qiang)在覆盎門(men)(men)西(xi)(xi)有一(yi)曲折(zhe)，其余(yu)各墻(qiang)都為(wei)直線。宮(gong)(gong)城為(wei)夯筑土墻(qiang)，厚達20多米(mi)。宮(gong)(gong)墻(qiang)四(si)面(mian)(mian)各設一(yi)座宮(gong)(gong)門(men)(men)，其中(zhong)東(dong)(dong)、西(xi)(xi)二門(men)(men)是主(zhu)要通(tong)道，門(men)(men)外有闕(que)樓(lou)稱(cheng)為(wei)東(dong)(dong)闕(que)和(he)(he)西(xi)(xi)闕(que)。南(nan)宮(gong)(gong)門(men)(men)與覆盎門(men)(men)南(nan)北(bei)(bei)相(xiang)對。東(dong)(dong)、南(nan)兩面(mian)(mian)臨(lin)城墻(qiang)，西(xi)(xi)隔安門(men)(men)大街(jie)與未央宮(gong)(gong)相(xiang)望。長(chang)樂(le)宮(gong)(gong)周(zhou)回二十(shi)余(yu)里(li)，內有14所宮(gong)(gong)殿(dian)(dian)(dian)(dian)(dian)，均坐(zuo)北(bei)(bei)向南(nan)。其中(zhong)前(qian)殿(dian)(dian)(dian)(dian)(dian)位于南(nan)面(mian)(mian)中(zhong)部(bu)，前(qian)殿(dian)(dian)(dian)(dian)(dian)西(xi)(xi)側有長(chang)信宮(gong)(gong)（即(ji)長(chang)信殿(dian)(dian)(dian)(dian)(dian)）、長(chang)秋殿(dian)(dian)(dian)(dian)(dian)、長(chang)定殿(dian)(dian)(dian)(dian)(dian)、永壽(shou)殿(dian)(dian)(dian)(dian)(dian)（即(ji)長(chang)壽(shou)殿(dian)(dian)(dian)(dian)(dian)）、永昌殿(dian)(dian)(dian)(dian)(dian)、永寧殿(dian)(dian)(dian)(dian)(dian)等；前(qian)殿(dian)(dian)(dian)(dian)(dian)北(bei)(bei)面(mian)(mian)有大夏殿(dian)(dian)(dian)(dian)(dian)、臨(lin)華(hua)殿(dian)(dian)(dian)(dian)(dian)、宣(xuan)德殿(dian)(dian)(dian)(dian)(dian)、通(tong)光殿(dian)(dian)(dian)(dian)(dian)、高明(ming)殿(dian)(dian)(dian)(dian)(dian)、建始殿(dian)(dian)(dian)(dian)(dian)、廣陽殿(dian)(dian)(dian)(dian)(dian)、神仙(xian)殿(dian)(dian)(dian)(dian)(dian)、椒房殿(dian)(dian)(dian)(dian)(dian)和(he)(he)長(chang)亭殿(dian)(dian)(dian)(dian)(dian)等。另有溫室殿(dian)(dian)(dian)(dian)(dian)、鐘室殿(dian)(dian)(dian)(dian)(dian)、月室殿(dian)(dian)(dian)(dian)(dian)以(yi)及秦始皇時在興樂(le)宮(gong)(gong)中(zhong)建造的(de)高達40丈的(de)鴻(hong)臺。
長樂宮(gong)是中國(guo)漢代的“三宮(gong)”之一。
漢(han)高祖五年(nian)(nian)（公元前202年(nian)(nian)）九月(yue)，由丞相蕭何(he)主持在(zai)秦興樂宮基礎(chu)上開始營(ying)修。
漢(han)高(gao)祖七年（公元(yuan)前200年）二(er)月，長樂宮(gong)竣(jun)工。史載(zai)：（漢(han)七年）二(er)月，高(gao)祖自(zi)平城過趙、雒陽(yang)，至長安。長樂宮(gong)成，丞(cheng)相(xiang)已下(xia)徙(xi)治長安。
漢高祖九年(nian)(nian)（公(gong)元前198年(nian)(nian)），朝廷遷往未央宮，長樂宮改為太后(hou)(hou)住(zhu)所。太后(hou)(hou)所住(zhu)宮殿為長信宮，是長樂宮建(jian)筑群中較重要的建(jian)筑物。
歲月靜好 
