長樂(le)宮遺址即現在(zai)的未央區閣老門、唐寨(zhai)(zhai)、張家巷、羅寨(zhai)(zhai)、講(jiang)武殿、中查、西查、東查，樊(fan)寨(zhai)(zhai)和雷寨(zhai)(zhai)等(deng)村莊(zhuang)。
長(chang)樂(le)宮(gong)(gong)的(de)考古工作(zuo)開始(shi)于1956年。經勘查，該宮(gong)(gong)平面(mian)形狀(zhuang)不規整，周長(chang)約10千米，面(mian)積約6平方千米，占長(chang)安城(cheng)總(zong)面(mian)積的(de)六分之一左右。宮(gong)(gong)墻四(si)門遺(yi)跡尚能辨認，宮(gong)(gong)內建(jian)筑已完全湮滅(mie)，只有長(chang)信(xin)宮(gong)(gong)、長(chang)秋宮(gong)(gong)等(deng)少數宮(gong)(gong)室，可(ke)據出土物印證。通過發(fa)掘表(biao)明，長(chang)樂(le)宮(gong)(gong)在東(dong)漢還保(bao)存完好(hao)，五代十國以后廢棄。
長(chang)樂宮(gong)遺址曾出土罕見排(pai)水(shui)(shui)(shui)(shui)(shui)渠道(dao)(dao)，在(zai)一(yi)米多深的(de)地下，兩組陶質排(pai)水(shui)(shui)(shui)(shui)(shui)管(guan)(guan)道(dao)(dao)如(ru)兩條南(nan)(nan)北(bei)向的(de)巨龍“聚首(shou)”在(zai)一(yi)條長(chang)達五(wu)(wu)十(shi)七(qi)米的(de)排(pai)水(shui)(shui)(shui)(shui)(shui)渠邊。而排(pai)水(shui)(shui)(shui)(shui)(shui)渠道(dao)(dao)由(you)一(yi)條排(pai)水(shui)(shui)(shui)(shui)(shui)渠和(he)長(chang)短不一(yi)、粗(cu)細不均(jun)的(de)五(wu)(wu)角形排(pai)水(shui)(shui)(shui)(shui)(shui)管(guan)(guan)道(dao)(dao)共同(tong)構成。排(pai)水(shui)(shui)(shui)(shui)(shui)渠長(chang)達五(wu)(wu)十(shi)七(qi)米，寬約一(yi)點八米，深約一(yi)點五(wu)(wu)米，在(zai)接(jie)納(na)了來(lai)自(zi)南(nan)(nan)方(fang)(fang)和(he)東方(fang)(fang)的(de)各個排(pai)水(shui)(shui)(shui)(shui)(shui)管(guan)(guan)道(dao)(dao)的(de)污水(shui)(shui)(shui)(shui)(shui)之后，便向西(xi)北(bei)方(fang)(fang)向流去。這從(cong)側面表明(ming)了西(xi)漢(han)時期(qi)中國皇宮(gong)具(ju)有較(jiao)高的(de)建筑水(shui)(shui)(shui)(shui)(shui)平。
經過多年的(de)(de)(de)考(kao)古(gu)勘探和發(fa)掘(jue)，長樂宮(gong)(gong)(gong)的(de)(de)(de)布局(ju)、范圍(wei)日漸清晰，并且與文(wen)獻中(zhong)的(de)(de)(de)記載相互印(yin)證。整個宮(gong)(gong)(gong)城占地(di)(di)面積(ji)約6平(ping)方(fang)公里，約占全城總面積(ji)的(de)(de)(de)六(liu)分(fen)之一(yi)，四周(zhou)建(jian)(jian)有(you)(you)圍(wei)墻。2003年發(fa)掘(jue)的(de)(de)(de)四號宮(gong)(gong)(gong)殿（據考(kao)古(gu)研究為臨(lin)華殿）遺址有(you)(you)2000平(ping)方(fang)米(mi)(mi)，房子(zi)為半地(di)(di)穴(xue)式，鵝(e)卵石鋪地(di)(di)后砂漿抹(mo)平(ping)地(di)(di)面，墻壁涂(tu)有(you)(you)白灰，并飾有(you)(you)奪目(mu)的(de)(de)(de)彩繪壁畫，通(tong)道(dao)(dao)和臺(tai)階鋪有(you)(you)精美的(de)(de)(de)印(yin)花磚，顯示出(chu)獨特的(de)(de)(de)審美取(qu)向。而后發(fa)掘(jue)出(chu)的(de)(de)(de)五號宮(gong)(gong)(gong)殿遺址形制獨特，遺址圍(wei)墻特別厚。專(zhuan)家(jia)們推測這里就是(shi)用來(lai)儲藏冰(bing)的(de)(de)(de)“凌(ling)室”，厚厚的(de)(de)(de)墻壁有(you)(you)利于保持室溫(wen)，所藏之冰(bing)用來(lai)儲藏食物、防腐保鮮和降溫(wen)納(na)涼。考(kao)古(gu)工(gong)作者發(fa)掘(jue)的(de)(de)(de)長樂宮(gong)(gong)(gong)內規模(mo)較大的(de)(de)(de)六(liu)號宮(gong)(gong)(gong)殿遺址，它(ta)的(de)(de)(de)中(zhong)心是(shi)一(yi)座大型夯(hang)土臺(tai)基(ji)，東(dong)西長約160米(mi)(mi)，南北殘寬50余米(mi)(mi)，建(jian)(jian)筑布局(ju)有(you)(you)序、結構精巧(qiao)，出(chu)土了(le)(le)大量的(de)(de)(de)建(jian)(jian)筑構件。據考(kao)證，這處規模(mo)宏(hong)偉(wei)的(de)(de)(de)建(jian)(jian)筑很(hen)可能就是(shi)長樂宮(gong)(gong)(gong)前(qian)殿遺址。除了(le)(le)房屋、水井、院落外，緊貼夯(hang)土臺(tai)基(ji)的(de)(de)(de)一(yi)條長34.29米(mi)(mi)、最寬處1.9米(mi)(mi)的(de)(de)(de)半地(di)(di)下(xia)通(tong)道(dao)(dao)引發(fa)了(le)(le)諸多猜想。有(you)(you)專(zhuan)家(jia)認為，這條地(di)(di)下(xia)通(tong)道(dao)(dao)就是(shi)皇(huang)宮(gong)(gong)(gong)中(zhong)的(de)(de)(de)秘(mi)道(dao)(dao)，是(shi)皇(huang)族們預防不測的(de)(de)(de)安全通(tong)道(dao)(dao)。
長樂宮(gong)周圍筑有宮(gong)城(cheng)，由于長樂宮(gong)是在(zai)秦興樂宮(gong)基礎上修(xiu)建起來(lai)的(de)缺乏系統規劃，平(ping)面不甚規整、為不規則的(de)方形，尤其(qi)南宮(gong)墻(qiang)凹凸轉折較多，宮(gong)城(cheng)四面各設一座宮(gong)門(men)，東門(men)和西門(men)外有闕。
宮(gong)(gong)(gong)垣東西(xi)長(chang)(chang)(chang)(chang)2900米(mi)，南(nan)(nan)北寬2400米(mi)，周長(chang)(chang)(chang)(chang)10600米(mi)，占地面(mian)積(ji)(ji)約6平方(fang)公里(li)(li)，約占漢(han)長(chang)(chang)(chang)(chang)安(an)(an)城(cheng)總面(mian)積(ji)(ji)的1/6。宮(gong)(gong)(gong)城(cheng)平面(mian)形(xing)(xing)制略呈方(fang)形(xing)(xing)，南(nan)(nan)墻(qiang)在覆盎門(men)(men)西(xi)有一曲折，其(qi)(qi)余各墻(qiang)都為(wei)(wei)直線(xian)。宮(gong)(gong)(gong)城(cheng)為(wei)(wei)夯筑土墻(qiang)，厚達(da)20多米(mi)。宮(gong)(gong)(gong)墻(qiang)四面(mian)各設一座宮(gong)(gong)(gong)門(men)(men)，其(qi)(qi)中(zhong)東、西(xi)二門(men)(men)是主要通道，門(men)(men)外有闕(que)樓稱為(wei)(wei)東闕(que)和西(xi)闕(que)。南(nan)(nan)宮(gong)(gong)(gong)門(men)(men)與覆盎門(men)(men)南(nan)(nan)北相對。東、南(nan)(nan)兩面(mian)臨城(cheng)墻(qiang)，西(xi)隔安(an)(an)門(men)(men)大街與未央宮(gong)(gong)(gong)相望。長(chang)(chang)(chang)(chang)樂宮(gong)(gong)(gong)周回二十余里(li)(li)，內有14所宮(gong)(gong)(gong)殿(dian)(dian)(dian)，均坐(zuo)北向南(nan)(nan)。其(qi)(qi)中(zhong)前殿(dian)(dian)(dian)位于南(nan)(nan)面(mian)中(zhong)部(bu)，前殿(dian)(dian)(dian)西(xi)側有長(chang)(chang)(chang)(chang)信宮(gong)(gong)(gong)（即長(chang)(chang)(chang)(chang)信殿(dian)(dian)(dian)）、長(chang)(chang)(chang)(chang)秋殿(dian)(dian)(dian)、長(chang)(chang)(chang)(chang)定殿(dian)(dian)(dian)、永壽殿(dian)(dian)(dian)（即長(chang)(chang)(chang)(chang)壽殿(dian)(dian)(dian)）、永昌(chang)殿(dian)(dian)(dian)、永寧殿(dian)(dian)(dian)等；前殿(dian)(dian)(dian)北面(mian)有大夏殿(dian)(dian)(dian)、臨華殿(dian)(dian)(dian)、宣德殿(dian)(dian)(dian)、通光殿(dian)(dian)(dian)、高(gao)(gao)明殿(dian)(dian)(dian)、建始(shi)殿(dian)(dian)(dian)、廣(guang)陽殿(dian)(dian)(dian)、神仙殿(dian)(dian)(dian)、椒房殿(dian)(dian)(dian)和長(chang)(chang)(chang)(chang)亭殿(dian)(dian)(dian)等。另有溫室殿(dian)(dian)(dian)、鐘室殿(dian)(dian)(dian)、月(yue)室殿(dian)(dian)(dian)以及秦(qin)始(shi)皇(huang)時在興樂宮(gong)(gong)(gong)中(zhong)建造的高(gao)(gao)達(da)40丈的鴻(hong)臺。
長樂宮(gong)(gong)是中國漢代的“三宮(gong)(gong)”之(zhi)一。
漢高(gao)祖五年（公元前202年）九月，由丞相蕭何主持在秦興(xing)樂宮(gong)基礎上開(kai)始營修(xiu)。
漢(han)高(gao)祖七(qi)年（公元(yuan)前200年）二(er)月，長樂宮竣(jun)工。史載：（漢(han)七(qi)年）二(er)月，高(gao)祖自平城過趙(zhao)、雒陽，至(zhi)長安。長樂宮成，丞相已下徙治長安。
漢(han)高祖九年(nian)（公元前198年(nian)），朝(chao)廷遷往(wang)未央宮(gong)，長樂宮(gong)改為(wei)太后(hou)住(zhu)所(suo)。太后(hou)所(suo)住(zhu)宮(gong)殿為(wei)長信(xin)宮(gong)，是長樂宮(gong)建筑(zhu)群中較重(zhong)要(yao)的建筑(zhu)物。
歲月靜好 
