LeConte Hall is a building on the campus of the University of California, Berkeley. It is home to the physics department. LeConte Hall was one of the largest physics buildings in the world at the time it was opened in 1924, and was also the site of the first atom collider, built by Ernest O. Lawrence in 1931. The building was named in honor of the brothers Joseph and John LeConte, professors of Physics and Geology, who were respectively the first and third presidents of UC Berkeley. In 2004, LeConte Hall was named to the National Register of Historic Places.