Mt. Salem Church grew out of a community Sunday School movement. Before any public schools, starting in 1814 or 1815, the Brandywine Manufacturers’ Sunday School program of reading, writing, and ciphering along with Bible lessons was first conducted on the floor of a mill and then in its own building at the DuPont Powder Works.  As public education became available the Brandywine Manufacturer’s Sunday School evolved into four Christian congregations.  In 1841, St. Joseph on the Brandywine Roman Catholic Church (President Biden’s Church) was formed, dropping out of the Sunday School. Mt. Salem Methodist Church was founded in 1847, leaving the Sunday School movement. In 1851, a third group withdrew from the Sunday School to organize the Greenhill Presbyterian Church. Finally, in 1856, the Brandywine Manufacturers’ Sunday School closed as Christ Episcopal Church opened for its people.