The Octagonal Schoolhouse was completed in 1827 by mill superintendent Benjamin Gilbert who was charged by mill owner William Ross to build it. The school was built using money and land donated by Mr. Ross, mill employees, and the three foot thick local stones. By 1870, attendance began declining and the school was closed in 1952. In 2015, Governor Cuomo awarded the Town of Moriah along with the Towns of Willsboro and Essex a grant to restore the schoolhouse and two other historic properties.