Willamette Heritage Center is a museum in Salem, Oregon, United States. The 5-acre site features several structures listed on the National Register of Historic Places including the Thomas Kay woolen mill, the Jason Lee House,[3] Methodist Parsonage,[4] John D. Boon House[5] and the Pleasant Grove (Condit) Church.[6] The houses and church were relocated to the mill site. The Center also includes a research library and archives of Marion County history.