The Mount Vernon German Reformed Church in Keedysville, MD, has a rich history. In 1835, a stone building was erected on property owned by J.J. Keedy. It was used as both a church and a school. The Reformed congregation organized and worshiped there until 1852, when a new Church was built on land donated by Samuel Cost. In 1892, the present Mt. Vernon Reformed United Church of Christ building was erected through the works of leading families of the community, including John J., Samuel, Christian Keedy, Samuel Pry, and the Cost family.
The interior has the Brussels carpeting, Eastlake potieres, and the 1852 original church chandelier. The pews reused from the 1852 church were said to have served as hospital beds when this church was used as a hospital after the Battle of Antietam. The chapel portion of the 1892 church was constructed over a mass grave containing the remains of soldiers who died at the hospital.