Erected in 1741, the Gemein Haus was the first house of worship in Bethlehem and a home for the clergy, among whom were Zinzendorf, Spangenberg, Nitschmann, Ettwein, and Seidel. It was the scene of the Great Wedding on July 15, 1749, and the place of the only school for the teaching of Indian languages. In its Saal in 1752, the Treaty of Friendship between the Nanticoke and Shawnee Indians and the Moravian Brethren was made, and many notable conferences in both the Colonial and Revolutionary periods were held in the building, which is now a home for the aged.