National Gallery of Art two months after excavation had begun. At the time of its inception it was the largest marble structure in the world. The museum stands on the former site of the Baltimore and Potomac Railroad station, where in 1881 a disgruntled office seeker, Charles Guiteau, shot President James Garfield (see James A. Garfield assassination). As anticipated by Mellon, the creation of the National Gallery encouraged the donation of other substantial art collections by a number of private donors. Founding benefactors included such individuals as Paul Mellon, Samuel H. Kress, Rush H. Kress, Ailsa Mellon Bruce, Chester Dale, Joseph Widener, Lessing J.
John R. Brady shot by an assassin, Charles Guiteau. Arthur, then Vice President, became President. Arthur was at home around midnight on the night of September 19, 1881 with Police Commissioner Stephen B. French, District Attorney Daniel G. Rollins, and attorney Elihu Root, when he learned in a telegram from members of Garfield's cabinet that Garfield had died. The cabinet members wired Arthur their advice that he should "take the oath of office as president of the United States without delay." It was after midnight when Arthur and his guests dispatched messengers to locate a judge who could administer the presidential oath. The