Established in 1940, the historic costume collection contains original dresses predating Texas statehood by First Ladies of the Texas Republic, as well as those worn by Texas First Ladies to the Governor's Inaugural Ball and gowns donated by Presidential First Ladies Mamie Eisenhower, Lady Bird Johnson, Barbara Bush, and Laura Bush. As of 2018, the collection consists of 47 gowns, of which 21 are on a rotating display in the Administration Conference Tower. Each dress has been loaned or donated by various sources to the University, with most dresses and their preservation costs through donations from Texas chapters of Daughters of the American Revolution, the Denton Benefit League, or directly from the First Ladies themselves.