长乐宫 / Changle Palace
长乐宫 / Changle Palace enters the wiki through Hanji 171 part 2 as the first major palace renovation after 刘邦 moves the 西汉 capital toward 长安. The episode says Liu Bang renovates the Qin-era Xinglegong in the leap ninth month and later lives there after completion in the second month of Han year seven.
The source uses the palace notice as institutional background rather than as architectural history. After the war-winning phase and the capital-location decision, the Han court now needs physical spaces for durable imperial rule. Changle Palace becomes part of that court geography together with 未央宫.
The episode also notes the later Western Han arrangement in which emperors normally live in Weiyang Palace while empress dowagers live in Changle Palace. In this source, that pattern is introduced through the later separation between 刘盈 and 吕雉.