From Gineipaedia, the Legend of Galactic Heroes wiki
Odin (Japanese: オーディン) is an planet in the Valhalla Starzone which served during much of the Goldenbaum Dynasty as the Imperial capital of the Galactic Empire. It has at least one moon. The Imperial City was where the palace, Neue Sanssouci, was located, home to the Goldenbaum Dynasty for 500 years, and later home to the Lohengramm Dynasty until the capital was relocated to Fezzan. Other government institutions were also located on the planet, such as the Ministry of War. These institutions were also subsequently relocated to Fezzan.
The DVD features show the capital and palace complex of Neue Sanssouci located on the edge of a large bay on the northern continent.