NRG Stadium, formerly Reliant Stadium, is a multi-purpose stadium in Houston, Texas, United States. Construction was completed in 2002, at a cost of $352 million and has a seating capacity of 72,220. It was the first NFL facility to have a retractable roof. NRG Stadium is part of a collection of venues (including the Astrodome), which are collectively called NRG Park. The entire complex is named for NRG Energy under a 32-year, $300 million naming rights deal in 2000.