The first class, consisting of four male students, began their studies on July 4, 1816, without any formal academic buildings. Within six years, Alden accumulated sufficient funds to begin building a campus. The first building erected, the library, was designed by Alden himself, and is a notable example of early American architecture. Bentley Hall is named in honor of Dr. William Bentley, who donated his private library to the College, a collection of considerable value and significance. In 1824, Thomas Jefferson wrote to Alden, expressing the hope that his University of Virginia could someday possess the richness of Allegheny's library. Alden served as president of the college until 1831, when financial and enrollment difficulties forced his resignation. Ruter Hall was built in 1853.