The Commission chose John Russell Pope as the architect in 1935. Pope was also the architect of the National Archives Building and original (west) building of the National Gallery of Art. He prepared four different plans for the project, each on a different site. One was on the Anacostia River at the end of East Capitol Street; one at Lincoln Park; one on the south side of the National Mall across from the National Archives; and one situated on the Tidal Basin, directly south of the White House. The Commission preferred the site on the Tidal Basin mainly because it was the most prominent site and because it completed the four-point plan called for by the McMillan Commission (Lincoln Memorial to the Capitol; White House to the Tidal Basin site). Pope designed a very large pantheon-like structure, to sit on a square platform, and to be flanked by two smaller, rectangular, colonnaded buildings.