The Dayton Masonic Center, formerly known as the Dayton Masonic Temple, is a significant building in Dayton, Ohio. It was built by a Masonic Temple Association formed from 14 Masonic groups. The building was completed over a 2-year, 9-month period by 450 workers, a majority of whom were Masonic Brethren, about which it was said: "Without thought of honor or gain, these men gave unstintingly of their time, abilities and means, sparing neither themselves nor their personal interests to advance this building project to its happy fulfillment."
The building is 265 feet (81 m) long by 190 feet (58 m) wide by 80 feet (24 m) high, and encloses 5,000,000 cubic feet (140,000 m3). It is constructed of steel, cement, and stone, including 55,000 cubic feet (1,600 m3) of Bedford stone and 15,000 cubic feet (420 m3) hard limestone and marble from Vermont, Alabama and Tennessee (marble used for interior floors, wainscotings, partitions and stairways).
The center is a contributing property in the Steele's Hill-Grafton Hill Historic District, a historic district that was added to the National Register of Historic Places in 1986. The building is also included in a locally designated historic district.
The Dayton Masonic Center is located north of the Great Miami River, across the Monument Street bridge and next to the Dayton Art Institute. It is convenient to both North and South bound Interstate 75 (directions