Imperial Chinese government office for official oversight and impeachment. Originally called 御史府 yù​shǐ​fǔ in the Western Han, it was renamed in the Eastern Han and used intermittently until replaced by the 都察院 dū​chá​yuàn in the Ming dynasty. Also known as 宪台 xiàn​tái, 兰台 lán​tái, or 肃政台 sù​zhèng​tái.