Originally, the arena was intended to be the home of the
World Aquatics Championships in
2021, but after the original host venue for the
2017 Championships in
Guadalajara withdrew in February 2015, Budapest, including the Danube Arena, was announced as the host for the 2017 Championships instead. Following the decision to move Budapest's hosting duties four years earlier, the building was re-designed, partially due to the originally-planned building being too small to be a potential venue for the
2024 Summer Olympics and also because of the advanced deadline. ==Technical features==