The Jason Lee House, the Methodist Parsonage, John D. Boon House and Pleasant Grove Church, dating from the 1840s and 1850s, are restored and furnished in period. The Lee House and Parsonage are said to be the oldest remaining frame houses in the Pacific Northwest. Both were built as part of the  Methodist Mission to Oregon. The Missionaries came to work with and Christianize area’s American Indians. The Lee House is said to have housed planning for the Provisional Government and the actions of the first judiciary, first post office, and second store in the Salem area. The Parsonage may have served as the Indian Manual Labor School while the schoolhouse was being built. The building that was to house the Indian School eventually became the Oregon Institute and later Willamette University. The John D. Boon house is likely the oldest single family dwelling in Salem. It was originally located next to the building known as Boon’s Treasury, which was built by Boon and his son and served as Oregon’s first State Treasury. The Pleasant Grove Church is thought to be the oldest remaining Presbyterian Church in the state of Oregon. These four historic buildings  are not original to the site, but were moved to the property during the 1970s and 1980s.