The Sith Embassy on Manaan was the base of the Sith representation on that planet. It was a large section of Ahto City and the cause of much trouble for the Republic on Manaan.
Revan is asked by Roland Wann to infiltrate this embassy and recover stolen data from a damaged probe droid. Revan agrees and tears the place apart in his search for the data, while he kills a Sith master and discovers the reason behind many "mysterious dissapearances" of Selkath youth.