Construction began on the Sixth & I Street Historic Synagogue in 1906, after architect Louis Levi and builder Arthur Cowsill satisfied District of Columbia engineers that the 45-foot span reinforced concrete foundation – new technology for the time – would hold the weight of the building committee, the engineers and seventy two courses of heavy brick, and, by implication, of the entire building. 

Born in Baltimore in 1868, Levi was a Massachusetts Institute of Technology graduate who designed buildings primarily in Baltimore and Philadelphia, and whose projects included the Shearith Israel Synagogue in Baltimore and another in Lakewood, New Jersey. Cowsill, the builder, also had a hand in many important buildings in the District of Columbia, including Union Station and the Old Post Office Building, as well as several hotels, apartment houses and fine residences.