Prominent theatre companies in Oklahoma include, in the capital city, Oklahoma City Theatre Company, Carpenter Square Theatre, Oklahoma Shakespeare in the Park, and CityRep. CityRep is a professional company affording equity points to those performers and technical theatre professionals. In <answer>Tulsa</answer>, Oklahoma's oldest resident professional company is American Theatre Company, and Theatre <answer>Tulsa</answer> is the oldest community theatre company west of the Mississippi. Other companies in <answer>Tulsa</answer> include Heller Theatre and <answer>Tulsa</answer> Spotlight Theater. The cities of Norman, Lawton, and Stillwater, among others, also host well-reviewed community theatre companies.
Where is the American Theatre Company based?
Tulsa