CLEVELAND PLAY HOUSE (Developing House). Founded in 1915 and recipient of the 2015 Regional Theatre Tony® Award, Cleveland Play House is America’s first professional regional theatre. Throughout its rich history, CPH has remained dedicated to its mission to inspire, stimulate and entertain diverse audiences in Northeast Ohio by producing plays and theatre education programs of the highest professional standards. CPH has produced more than 100 world and/or American premieres, and over its long history more than 12 million people have attended over 1,600 productions.