'Pittsburgh's civic arena was the first public auditorium to have a retractable one of these'
a dome (or roof)
THE PENN.: Pittsburghs civic arena was the first public auditorium to have a retractable one of these
Pittsburgh's civic arena was the first public auditorium to have a retractable one of these
Pittsburgh's civic arena was the first public auditorium to have a retractable one of these
THE PENN.
a dome or roof
THE PENN.