The Hofburg Congress Center offers 182,000 sq. ft of space spread across 35 rooms for events for anything from 50 to 4,900 people. The crowning glory comes courtesy of the imperial staterooms — complete with state-of-the-art conference equipment. The Habsburg’s former winter residences covers a total of 5.381.955 sq. ft. and comprises 18 wings with 54 staircases, 19 courtyards and 2,600 rooms.