Prime Minister's official residence
From Gineipaedia, the Legend of Galactic Heroes wiki
The Prime Minister's official residence (Japanese: 宰相府) was a building in the Imperial City on Odin that was used by Reinhard von Lohengramm during his tenure as the Prime Minister of the Galactic Empire, from early 798 UC (489 IC / 3598 CE) to mid 799 UC (1 NIC / 490 IC / 3599 CE). It is not clear if it had been used earlier by his predecessor, Klaus von Lichtenlade, under the reign of Kaiser Friedrich IV. After the fall of Lichtenlade, in the aftermath of the Imperial Civil War, most government functions were performed at this office while the expenses of the child emperor Erwin Josef II's residence, the Imperial palace Neue Sanssouci, were cut.