6 Messe Basel: facts and figures Exhibition area in square metres (gross) Exhibitions (annually) Exhibitors (annually) Visitors (annually) Various events in the exhibition halls (annually) Parking spaces in the Messe Basel car park 141 000 20 to 25 6 000 to 8 000 approx. 1 million 15 to 20 1 200 3. Messe Basel site plan Musical Theater Hall 3