Built and dedicated in 1893, this stone chapel was constructed of locally quarried, rusticated Berea sandstone blocks. A Celtic cross at the top of the west wall represented the areas of Great Britain from which many original parish members immigrated to this area of Ohio. The chapel was named in honor of John Ogilvy, who was not a member of St. Thomas Church but left a bequest that the parish used to erect it, at a cost of $4,174.70. Memorial windows on the west wall honor Joseph Nichols, Marvin E. Stone, William A James, and the Rev. Willis B. French. Nichols served as mayor of Berea in 1878 and 1879. Stone, a warden of St. Phillip’s (Albion/Strongsville), became a highly regarded member of St. Thomas after it absorbed the languishing parishes of St. Phillip’s and St. Luke’s in 1873; as part of the merger, St. Phillip’s gave its church building to St. Thomas. James was a strong supporter of St. Thomas and served in the vestry. French was St. Thomas’s rector from 1879 to 1887.