European Aquatics Masters Championships

The European Aquatics Masters Championships (or LEN Masters Championships) is an international Aquatics championships for competitors that are aged 25 years and older per World Aquatics Masters rules. The championships are held biennially (in odd years until 2013, then even years from 2016), with competition in all five World Aquatics disciplines: swimming, diving, water polo, open water swimming, and synchronized swimming.

Source: Wikipedia — European Aquatics Masters Championships (CC BY-SA 4.0)