Ralph Rapson was selected to design the 1963 theater building. Rapson was a leading contributor to architecture's modern movement on the East Coast from the late 1940s through the 1950s, and served as head of the University of Minnesota School of Architecture in the late 1950s. Rapson had also worked on some preliminary sketches of the Walker Art Center, which donated land on Vineland Place for the Guthrie's construction. Guthrie and Rapson selected a modified theater in the round design that featured a thrust stage projecting from a back wall with seating surrounding nearly two thirds of it.