The largest is Pat O'Brien Hall with 68,680 square feet ( 6,381 m ) of space .
The largest seating up to 6,800 ; its ceiling height is 35 feet ( 11 m ) .
The largest is Pat O'Brien Hall with 68,680 square feet ( 6,381 m ) of space and seating up to 6,800 ; its ceiling height is 35 feet ( 11 m ) .