A Science Hall was built in 1883 under the direction of Fr. Zahm, but in 1950 it was converted to a student union building and named LaFortune Center, after Joseph LaFortune, an oil executive from Tulsa, Oklahoma. Commonly known as "LaFortune" or "LaFun," it is a 4-story building of 83,000 square feet that provides the Notre Dame community with a meeting place for social, recreational, cultural, and educational activities. LaFortune employs 35 part-time student staff and 29 full-time non-student staff and has an annual budget of $1.2 million. Many businesses, services, and divisions of The Office of Student Affairs are found within. The building also houses restaurants from national restaurant chains.