The first mosque built from the ground up in the United States was erected in Cedar Rapids, Iowa, almost a century ago by immigrants from present-day Lebanon. Today, their descendants and newcomers from Afghanistan, East Africa and beyond are continuing to redefine what it means to be both Muslim and American in the heartland. The Muslim community that founded the “Mother Mosque” keeps growing. Its prayer and cultural centers are key spaces as they seek to maintain and transmit their faith and heritage, while also embracing in varying degrees the diversity of U.S. culture.