Plans were drawn up in 1967 by the New Orleans modernist architectural firm of Curtis and Davis and the building opened as the Louisiana Superdome in 1975. Its steel frame covers a 13-acre (5.3 ha) expanse and the 273-foot (83 m) dome is made of a lamellar multi-ringed frame and has a diameter of 680 feet (207 m), making it the largest fixed domed structure in the world.

The Superdome has routinely hosted major sporting events; it has hosted seven Super Bowl games (and will host its eighth, Super Bowl LIX, in 2025), and five NCAA championships in men's college basketball. In college football, the Sugar Bowl has been played at the Superdome since 1975, which is one of the "New Year's Six" bowl games of the College Football Playoff (CFP). It also traditionally hosts the Bayou Classic, a rivalry game played between the HBCUs Southern University and Grambling State University. The Superdome was also the long-time home of the Tulane Green Wave football team of Tulane University until 2014 (when they returned on-campus at Yulman Stadium), and was the home venue of the New Orleans Jazz of the National Basketball Association (NBA) from 1975 until 1979.

In 2005, the Superdome housed thousands of people seeking shelter from Hurricane Katrina. The building suffered extensive damage as a result of the storm, and was closed for many months afterward. The building was fully refurbished and reopened in time for the Saints' 2006 home opener on September 25.

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