Ohio Stadium opened in 1922 and is known for its award-winning horseshoe shape which was designed by an Ohio-born architect, Howard Dwight-Smith. Though there was initial concern that the 66,210 opening capacity would be too large, 90,411 fans came to cheer the Buckeyes in 1925. After World War II, the Stadium was regularly sold out and seating accomodations increased every few years to keep up with demand. Today, the capacity is over 102 thousand seats and it is the fourth largest football stadium in the US. On the north side, the Stadium features a rotunda - originally inspired by the Pantheon in Rome - with stained glass windows of Buckeye teams. In 1974, after one of seven undefeated seasons that the Buckeyes have had in Ohio Stadium, the venue was added to the National Register of Historic Places.