http://www.tacomadome.org/history.aspx
"The Tacoma Dome is one of the largest wood domed structures in the world.* It is owned and operated by the City of Tacoma’s Public Assembly Facilities Department.* Flexibility is the key to the success of the Tacoma Dome.* With numerous seating configurations available – 65% of the seating is moveable – almost any event is possible.* Unique seating configurations ranging from 5,000 to 23,000 combined with a sound reverberation of 2.5 seconds make the Tacoma Dome the Preferred Concert Venue of the Pacific Northwest."