Reproduction of a vintage photo of Clemson's Main Building taken between 1899 and 1905. We know this because Clemson bought the first clock for the tower in 1905. All photos after 1899 and before the first clock was installed have 9:13 on the clock. Originally, "The Main Building" was the center of campus and was known at the "College", the "Main Building", the "Ag Building", "Old Main" and many others. It was officially renamed "Tillman Hall" in 1943.