In the southernmost wing of the Palace, Count Antal Grassalkovich II (1734–1794) had a theatre auditorium constructed between 1782 and 1785. 24.5 m long, 8 m wide and 9.5 m high, the space resulted from making the formerly 3-storey wing into one. The walls were decorated with Neo-classical, late Baroque paintings. The theatre was in operation only when the Count was in residence at Gödöllő.
