Percival Lowell Milan Observatory. In 1894 Lowell chose Flagstaff, Arizona Territory, as the home of his new observatory. At an altitude of over , with few cloudy nights, and far from city lights, Flagstaff was an excellent site for astronomical observations. This marked the first time an observatory had been deliberately located in a remote, elevated place for optimal seeing. For the next fifteen years he studied Mars extensively, and made intricate drawings of the surface markings as he perceived them. Lowell published his views in three books: "Mars" (1895), "Mars and Its Canals" (1906), and "Mars As the Abode of Life"
A. Lawrence Lowell including Widener Library, the Memorial Church and many others, had transformed the university's infrastructure. Also among the new campus buildings of Lowell's tenure was the President's House (later called Loeb House) at 17 Quincy Street, which Lowell commissioned from his cousin Guy Lowell. It remained the residence of succeeding Harvard Presidents until 1971. Lowell is remembered as well for a donation of one million dollars to help found the Harvard Society of Fellows. Years before, he had given $10,500 to purchase a 13-inch telescope for his deceased brother Percival's Lowell Observatory, which in 1930 gained fame as the Pluto Discovery