Among throngs of people touring the Islamic Society of Boston Cultural Center on Sunday were two lanky middle school girls who love to talk about religion.
"What do you believe?" they often ask each other.
Mary Matero, 12, is Catholic and lives in West Roxbury. Mareyama Jalloh, 13, is Muslim and lives in East Boston. The girls met last fall during orientation at John D. O'Bryant School of Mathematics and Science in Roxbury.
On the second annual Open Mosque Day, more than 21 mosques across Massachusetts were scheduled to open their doors Sunday afternoon to people of all backgrounds so they could meet their Muslim neighbors, according to the Council on American-Islamic Relations-Massachusetts.