The first students assembled for class on December 14, 1891. Classes were held for two and one-half years in local churches until the first academic building, later known as Old Central, was dedicated on June 15, 1894, on the southeast corner of campus, which at the time was flat plowed prairie. In 1896, Oklahoma A&M held its first commencement with six male graduates. The first Library was established in Old Central in one room shared with the English Department. The first campus building to have electricity, Williams Hall, was constructed in 1900. With its turreted architecture it was referred to as the “Castle of the Prairies”; It remained standing until 1969. One of the earliest campus buildings was also a barn, used as part of an agricultural experiment station, which was served by a large reservoir pond created in 1895. The barn burned in 1922, but the pond, enlarged and remodeled in 1928 and 1943, is now known as Theta Pond, a popular campus scenic landmark. In 1906, Morrill Hall was completed and became the principal building on campus. A fire gutted the building in 1914, but the outside structure survived intact, and the interior was reconstructed.