Union Building, Student center at University of Texas at Austin, United States.

The Union Building is a student center on the University of Texas at Austin campus, built in 1933 to a design by Paul Cret, who also designed the Tower and Main Building. Its staggered, asymmetrical walls are smooth limestone and ashlar fossiliferous limestone. Inside are a bowling alley, a formal ballroom and the Cactus Café music venue.

The building was designed in 1933 by architect Paul Cret and funded through donations from Texas Exes. This alumni organization drove the fundraising effort that made the project possible.

The Cactus Café, a music venue inside the Union, opened in 1933 as the Chuck Wagon. When the university announced its closure in January 2010 to save $66,000, supporters formed the non-profit Friends of the Cactus Café; it stayed open under the management of KUT, the PBS radio station.

The Union Building stands on the University of Texas at Austin campus, designed by Paul Cret, who also drew the Tower and Main Building. Inside are a bowling alley and a formal ballroom, and the Cactus Café, opened in 1933 as the Chuck Wagon, hosts music. The staggered, asymmetrical limestone facade differs from Cret's classically balanced Battle Hall.

The bowling alley sits inside the Union Building itself, one of four campus buildings meant for recreation and entertainment when it opened in 1933, alongside Gregory Gymnasium for Men, the Women's Gymnasium and Hogg Memorial Auditorium. The building also holds a formal ballroom.