長(chang)樂宮(gong)遺址即現在的(de)未央區閣老門、唐寨(zhai)(zhai)、張家巷、羅寨(zhai)(zhai)、講(jiang)武殿(dian)、中查、西查、東(dong)查，樊(fan)寨(zhai)(zhai)和雷(lei)寨(zhai)(zhai)等村莊(zhuang)。
長(chang)(chang)樂宮的考古工作(zuo)開(kai)始于(yu)1956年。經勘查(cha)，該宮平面形(xing)狀不規整(zheng)，周(zhou)長(chang)(chang)約10千米，面積約6平方千米，占長(chang)(chang)安城總面積的六分之一左右。宮墻四門遺跡尚能辨認(ren)，宮內建筑已(yi)完全湮滅(mie)，只有長(chang)(chang)信(xin)宮、長(chang)(chang)秋(qiu)宮等(deng)少(shao)數宮室，可據出土物印證。通過發掘表(biao)明，長(chang)(chang)樂宮在東漢還保存完好，五代十國(guo)以后廢棄。
長樂(le)宮遺址(zhi)曾出土罕見排(pai)(pai)水(shui)(shui)渠道，在一(yi)米多深的地(di)下，兩組陶質(zhi)排(pai)(pai)水(shui)(shui)管(guan)道如(ru)兩條(tiao)南(nan)北(bei)向的巨龍“聚(ju)首”在一(yi)條(tiao)長達(da)五(wu)十七米的排(pai)(pai)水(shui)(shui)渠邊。而排(pai)(pai)水(shui)(shui)渠道由一(yi)條(tiao)排(pai)(pai)水(shui)(shui)渠和(he)長短(duan)不一(yi)、粗細不均的五(wu)角形排(pai)(pai)水(shui)(shui)管(guan)道共同構成。排(pai)(pai)水(shui)(shui)渠長達(da)五(wu)十七米，寬約(yue)一(yi)點八米，深約(yue)一(yi)點五(wu)米，在接(jie)納了來自南(nan)方(fang)和(he)東方(fang)的各(ge)個排(pai)(pai)水(shui)(shui)管(guan)道的污(wu)水(shui)(shui)之后(hou)，便向西(xi)北(bei)方(fang)向流去。這從側面表明了西(xi)漢時期中(zhong)國皇宮具(ju)有較(jiao)高(gao)的建筑(zhu)水(shui)(shui)平。
經過多年(nian)的(de)(de)(de)(de)(de)(de)(de)考(kao)古(gu)勘探和發掘，長(chang)樂宮(gong)(gong)(gong)(gong)的(de)(de)(de)(de)(de)(de)(de)布局、范(fan)圍(wei)日漸清(qing)晰，并且(qie)與(yu)文(wen)獻中(zhong)的(de)(de)(de)(de)(de)(de)(de)記載相互印證。整(zheng)個宮(gong)(gong)(gong)(gong)城占(zhan)地面積約(yue)(yue)6平方(fang)(fang)公(gong)里，約(yue)(yue)占(zhan)全(quan)城總面積的(de)(de)(de)(de)(de)(de)(de)六分(fen)之一，四(si)周建(jian)有(you)(you)圍(wei)墻。2003年(nian)發掘的(de)(de)(de)(de)(de)(de)(de)四(si)號宮(gong)(gong)(gong)(gong)殿(dian)（據考(kao)古(gu)研究為(wei)臨(lin)華殿(dian)）遺(yi)址(zhi)(zhi)有(you)(you)2000平方(fang)(fang)米(mi)，房子為(wei)半地穴式，鵝卵石(shi)鋪(pu)地后砂漿抹平地面，墻壁涂有(you)(you)白灰，并飾有(you)(you)奪目的(de)(de)(de)(de)(de)(de)(de)彩(cai)繪壁畫，通道(dao)(dao)和臺階(jie)鋪(pu)有(you)(you)精美(mei)的(de)(de)(de)(de)(de)(de)(de)印花磚，顯示出獨(du)特的(de)(de)(de)(de)(de)(de)(de)審美(mei)取向。而(er)后發掘出的(de)(de)(de)(de)(de)(de)(de)五號宮(gong)(gong)(gong)(gong)殿(dian)遺(yi)址(zhi)(zhi)形(xing)制(zhi)獨(du)特，遺(yi)址(zhi)(zhi)圍(wei)墻特別厚(hou)。專家們推(tui)測這里就(jiu)(jiu)是(shi)用(yong)來儲(chu)藏(zang)冰(bing)的(de)(de)(de)(de)(de)(de)(de)“凌室(shi)”，厚(hou)厚(hou)的(de)(de)(de)(de)(de)(de)(de)墻壁有(you)(you)利于保(bao)持(chi)室(shi)溫，所藏(zang)之冰(bing)用(yong)來儲(chu)藏(zang)食物、防腐保(bao)鮮和降溫納涼。考(kao)古(gu)工作者發掘的(de)(de)(de)(de)(de)(de)(de)長(chang)樂宮(gong)(gong)(gong)(gong)內規模(mo)較大的(de)(de)(de)(de)(de)(de)(de)六號宮(gong)(gong)(gong)(gong)殿(dian)遺(yi)址(zhi)(zhi)，它的(de)(de)(de)(de)(de)(de)(de)中(zhong)心是(shi)一座大型夯土臺基，東西長(chang)約(yue)(yue)160米(mi)，南北(bei)殘寬50余米(mi)，建(jian)筑布局有(you)(you)序、結構精巧，出土了大量的(de)(de)(de)(de)(de)(de)(de)建(jian)筑構件。據考(kao)證，這處規模(mo)宏偉的(de)(de)(de)(de)(de)(de)(de)建(jian)筑很可能(neng)就(jiu)(jiu)是(shi)長(chang)樂宮(gong)(gong)(gong)(gong)前殿(dian)遺(yi)址(zhi)(zhi)。除了房屋、水(shui)井、院落外，緊貼夯土臺基的(de)(de)(de)(de)(de)(de)(de)一條(tiao)長(chang)34.29米(mi)、最寬處1.9米(mi)的(de)(de)(de)(de)(de)(de)(de)半地下(xia)通道(dao)(dao)引(yin)發了諸多猜想(xiang)。有(you)(you)專家認為(wei)，這條(tiao)地下(xia)通道(dao)(dao)就(jiu)(jiu)是(shi)皇宮(gong)(gong)(gong)(gong)中(zhong)的(de)(de)(de)(de)(de)(de)(de)秘道(dao)(dao)，是(shi)皇族們預防不測的(de)(de)(de)(de)(de)(de)(de)安全(quan)通道(dao)(dao)。
長樂(le)(le)宮周圍(wei)筑(zhu)有宮城，由于長樂(le)(le)宮是在秦興樂(le)(le)宮基礎(chu)上修(xiu)建起來的缺(que)乏系統規劃(hua)，平(ping)面(mian)不甚規整、為不規則的方形，尤(you)其南宮墻凹凸轉折較多(duo)，宮城四(si)面(mian)各設一座宮門(men)(men)，東門(men)(men)和(he)西門(men)(men)外有闕。
宮(gong)垣(yuan)東(dong)(dong)西(xi)長(chang)(chang)(chang)(chang)2900米，南(nan)北(bei)寬2400米，周(zhou)長(chang)(chang)(chang)(chang)10600米，占地(di)面(mian)(mian)(mian)積約6平(ping)方(fang)公里，約占漢長(chang)(chang)(chang)(chang)安(an)城(cheng)總面(mian)(mian)(mian)積的(de)(de)1/6。宮(gong)城(cheng)平(ping)面(mian)(mian)(mian)形制(zhi)略(lve)呈方(fang)形，南(nan)墻(qiang)(qiang)在覆(fu)盎門(men)西(xi)有(you)(you)(you)(you)一曲折，其(qi)余各(ge)墻(qiang)(qiang)都為(wei)直(zhi)線。宮(gong)城(cheng)為(wei)夯筑土墻(qiang)(qiang)，厚(hou)達20多(duo)米。宮(gong)墻(qiang)(qiang)四面(mian)(mian)(mian)各(ge)設一座(zuo)宮(gong)門(men)，其(qi)中(zhong)東(dong)(dong)、西(xi)二門(men)是主要通(tong)道，門(men)外(wai)有(you)(you)(you)(you)闕樓稱為(wei)東(dong)(dong)闕和西(xi)闕。南(nan)宮(gong)門(men)與覆(fu)盎門(men)南(nan)北(bei)相(xiang)對。東(dong)(dong)、南(nan)兩面(mian)(mian)(mian)臨(lin)(lin)城(cheng)墻(qiang)(qiang)，西(xi)隔安(an)門(men)大(da)(da)街與未(wei)央(yang)宮(gong)相(xiang)望。長(chang)(chang)(chang)(chang)樂宮(gong)周(zhou)回二十余里，內有(you)(you)(you)(you)14所宮(gong)殿(dian)(dian)(dian)(dian)，均坐北(bei)向(xiang)南(nan)。其(qi)中(zhong)前(qian)殿(dian)(dian)(dian)(dian)位于南(nan)面(mian)(mian)(mian)中(zhong)部，前(qian)殿(dian)(dian)(dian)(dian)西(xi)側有(you)(you)(you)(you)長(chang)(chang)(chang)(chang)信(xin)宮(gong)（即長(chang)(chang)(chang)(chang)信(xin)殿(dian)(dian)(dian)(dian)）、長(chang)(chang)(chang)(chang)秋殿(dian)(dian)(dian)(dian)、長(chang)(chang)(chang)(chang)定殿(dian)(dian)(dian)(dian)、永(yong)壽(shou)殿(dian)(dian)(dian)(dian)（即長(chang)(chang)(chang)(chang)壽(shou)殿(dian)(dian)(dian)(dian)）、永(yong)昌殿(dian)(dian)(dian)(dian)、永(yong)寧殿(dian)(dian)(dian)(dian)等；前(qian)殿(dian)(dian)(dian)(dian)北(bei)面(mian)(mian)(mian)有(you)(you)(you)(you)大(da)(da)夏殿(dian)(dian)(dian)(dian)、臨(lin)(lin)華殿(dian)(dian)(dian)(dian)、宣德殿(dian)(dian)(dian)(dian)、通(tong)光殿(dian)(dian)(dian)(dian)、高明殿(dian)(dian)(dian)(dian)、建始(shi)殿(dian)(dian)(dian)(dian)、廣陽殿(dian)(dian)(dian)(dian)、神(shen)仙殿(dian)(dian)(dian)(dian)、椒房殿(dian)(dian)(dian)(dian)和長(chang)(chang)(chang)(chang)亭(ting)殿(dian)(dian)(dian)(dian)等。另有(you)(you)(you)(you)溫(wen)室殿(dian)(dian)(dian)(dian)、鐘室殿(dian)(dian)(dian)(dian)、月(yue)室殿(dian)(dian)(dian)(dian)以(yi)及秦始(shi)皇(huang)時在興樂宮(gong)中(zhong)建造(zao)的(de)(de)高達40丈(zhang)的(de)(de)鴻臺。
長樂宮是中國漢代的“三宮”之一。
漢高(gao)祖五年(nian)（公元(yuan)前(qian)202年(nian)）九月，由(you)丞相(xiang)蕭何主持在秦興樂宮基礎(chu)上開始營修。
漢高(gao)祖七(qi)年(nian)（公(gong)元前200年(nian)）二月(yue)，長(chang)(chang)樂(le)宮(gong)竣工。史載：（漢七(qi)年(nian)）二月(yue)，高(gao)祖自平城(cheng)過趙、雒陽，至長(chang)(chang)安。長(chang)(chang)樂(le)宮(gong)成，丞相已(yi)下徙治長(chang)(chang)安。
漢高(gao)祖九年（公元前198年），朝廷遷往未央宮(gong)，長樂(le)宮(gong)改為太(tai)后(hou)住(zhu)(zhu)所。太(tai)后(hou)所住(zhu)(zhu)宮(gong)殿(dian)為長信(xin)宮(gong)，是(shi)長樂(le)宮(gong)建筑群(qun)中較(jiao)重要的建筑物。
歲月靜好 
