Short answers, pulled from the story.
NRG Stadium opened on the 24th of August 2002 with a preseason game between the Miami Dolphins and the Houston Texans, which the Dolphins won 24-3. The first regular season game followed on the 8th of September 2002, when the Texans defeated the Dallas Cowboys 19-10.
Construction of NRG Stadium cost $352 million. Groundbreaking was on the 9th of March 2000 and the stadium was completed in 30 months.
The roof panels at NRG Stadium can open or close in as little as seven minutes. The panels move at a speed of up to 35 feet per minute along rails supported by a 675-foot super-truss.
NRG Stadium has hosted two Super Bowls. Super Bowl XXXVIII was played on the 1st of February 2004, when the New England Patriots defeated the Carolina Panthers 32-29. Super Bowl LI was played in 2017, when the Patriots defeated the Atlanta Falcons 34-28 in the first Super Bowl game to go into overtime.
NRG Stadium will host seven matches at the 2026 FIFA World Cup: five group stage games, one Round of 32 match, and one Round of 16 match scheduled for the 4th of July 2026. The stadium will be temporarily called Houston Stadium during the tournament.
NRG Energy announced on the 15th of April 2026 that it will restore the Reliant Stadium name after the 2026 FIFA World Cup ends. The decision followed polling of the team and the company that found support for returning to the original name. New Reliant signage is set to be installed before the first Texans preseason game of the 2026 season.