Short answers, pulled from the story.
The FedExForum officially opened its doors in September 2004 following delays from a derecho wind storm that struck Memphis on the 22nd of July, 2003. Public bonds totaling $250 million funded the project while officials sought a replacement for the obsolete Pyramid venue which was already outdated by 2001.
FedEx paid $92 million for naming rights to keep the deal alive during the construction phase. The city had been debating the project for years before weather events added urgency to the timeline for completion.
Daktronics installed transparent units at the FedExForum in 2004 to resolve visibility issues for fans sitting behind the basket. The NBA approved the unit a year later for full use across all venues and every NBA arena implemented these transparent clocks by the 2011, 12 season.
The venue hosted the college basketball game on the 23rd of February 2008 featuring the No. 1 ranked Memphis Tigers versus the No. 2 ranked Tennessee Volunteers. It also served as the site for South regional semifinals and finals in 2009, 2014, and 2017 editions of the NCAA Division I men's basketball tournament.
On the 21st of September 2006, Nashville Predators played Columbus Blue Jackets in the first ice hockey game ever held there. World Wrestling Entertainment's Unforgiven event took place on the 16th of September 2007 headlined by The Undertaker and Mark Henry.