The Senate Park Commission, or McMillan Commission, established by Michigan Senator James McMillan, brought together Burnham and three of his colleagues from the World's Columbian Exposition—architect Charles Follen McKim, landscape architect Frederick Law Olmsted, Jr., and sculptor Augustus Saint-Gaudens. Going well beyond Pierre L'Enfant's original vision for the city, the plan provided for the extension of the Mall beyond the Washington Monument to a new Lincoln Memorial and a "pantheon" that eventually materialized as the Jefferson Memorial. This plan involved significant reclamation of land from swamp and the Potomac River, and the relocation of an existing railroad station on the site, which was replaced by Burnham's own design for Union Station.[11] As a result of his service on the McMillan Commission, in 1910 Burnham was appointed a member and the first chairman of the United States Commission of Fine Arts, helping to assure the implementation of the McMillan Plan's vision.