The Ronald O. Perelman Center for Political Science and Economics has opened its doors at the corner of Walnut and 36th streets. The $77.6 million project, which doubled the capacity of a 1925 building whose south and west Art Deco facades have been retained, unites the School of Arts & Sciences’ political science and economics departments under one roof, along with six related academic and research centers: the Center for the Advanced Study of India; the Christopher H. Browne Center for International Politics; the Center for the Study of Contemporary China; the Andrea Mitchell Center for the Study of Democracy; the Penn Institute for Economic Research; and the Penn Program on Opinion Research and Election Studies. The 110,000-square-foot facility, designed by Toronto-based architecture firm KPMB, includes a 120-seat auditorium, a 72-seat forum, classrooms, undergraduate meeting rooms, and faculty offices.