The Matthews Opera House, built in 1906, is the centerpiece of the arts in Spearfish. The mission of The Matthews Opera House and Arts Center is to promote the arts and humanities by providing quality programming and education while preserving the 1906 building. The Matthews operates the Art Gallery, a forum for visual arts, and the Matthews Opera House Theater, offering live theater and concerts throughout the year. Open 10 a.m.-5 p.m., Monday-Saturday (plus performances and special events).