 This ride was referred to as Project MMXX during the early construction stages and replaced an earlier project named Project Madrid, where Busch Gardens filed a 315 feet height waiver for a cancelled and unbuilt attraction.The initial planning application for the ride was filed in February 2019, and it was eventually announced to be Pantheon on July 30, 2019.The announcement was held in the globe theater at the park and streamed live on the parks Facebook page.