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.
Charles J. Guiteau over the first time he fired it. Guiteau's pistol was recovered after the assassination, and even photographed by the Smithsonian in the early 20th century, but it has since been lost. On one occasion, Guiteau trailed Garfield to the railway station as the President was seeing his wife off to a beach resort in Long Branch, New Jersey, but he decided to postpone his plan because Garfield's wife Lucretia was in poor health and Guiteau did not want to upset her. Having been alerted to the president's schedule by a newspaper article, on July 2, 1881, he lay in wait