Bonfils Memorial Theatre, also known as Lowenstein Theatre, was a community theatre in the Capitol Hill neighborhood of Denver, Colorado, which operated from 1953 to 1986. Built by Denver philanthropist Helen Bonfils in memory of her parents, Frederick Gilmer Bonfils and Belle Barton Bonfils, it staged plays, operas, concerts, films, lectures, and television shows, presenting more than 400 productions. In 1985 it was renamed the Lowenstein Theatre in honor of its longtime producer, . The theatre closed in 1986 and sat vacant for two decades. It was purchased in 2005 by Charles Woolley of the St. Charles Town Company, which renovated and reopened the building in 2006 as a Tattered Cover bookstore. The theatre building is listed on the National Register of Historic Places.