The Senate Rotunda was the building on Coruscant in the center of the Senate District which served as the seat of the Galactic Senate from the end of the Great Sith War until the end of the Old Republic, also serving as the seat of the Imperial Senate during the Galactic Empire, with the Grand Convocation Chamber at its heart. The designers claimed that any weapon capable of destroying the Chamber would also have to be powerful enough to destroy the entire planet, making the facility invulnerable against sabotage or orbital bombardment.