This is a bit strange of a postcard. It features the Purdue "P" with the back of a statue.
The statue is actually of John Purdue, the university's name sake. Purdue donated money to help start the university which, despite widespread belief, is actually a state and not private university. He died on September 12, 1876 which was the first day of classes for the school's only 3rd school year and is buried nearby this statue on campus.
Why someone decided to take a photo and make a postcard of the back of his statue....is beyond me. I have other postcards (that are given away free at the Memorial Union Building) featuring the front of the statue.