FINA World Aquatics Championships
The FINA World Championships or World Aquatics Championships are the World Championships for aquatics sports: swimming, diving, high diving, open water swimming, artistic swimming, and water polo. They are run by FINA, and all swimming events are contested in a long course (50-metre) pool. The event was first held in 1973 in Belgrade, Yugoslavia, and is now held every two years. From 1978 to 1998, the World Championships were held every four years, in the even years between Summer Olympic years. From 2001 until 2019, the Championships have been held every two years, in the  odd years. Due to the effects of the Covid-19 pandemic, the scheduling of both the Olympic Games and the Championships between 2019 and 2025 became somewhat erratic, with World Championships not taking place in Japan in 2021 to accommodate the delayed 2020 Summer Olympics, and then delayed again to 2023 because of pandemic-related issues in Japan. As a result, an extraordinary edition of the event was announced for 2022 in Budapest, Hungary, so as not to leave a four year gap between World Championships. As a result, World Championships will be held in four consecutive years for the first  time - 2022 in Hungary, 2023 in Japan (the original 2021 event, delayed twice), 2024 in Qatar (moved to 2024 from the original 2023 event, then moved again to the start of 2024 to accommodate the Paris 2024 Summer Olympics), and 2025 in Russia. Athletes from all 209 FINA members could take part in the competition. In 2019, records were set for the most countries participating, with 192 members, and the most athletes participating, with 2,623 athletes. Championships. <nowiki>*</nowiki> Record by number of gold medals – (23 gold medals, 1978)<BR> <nowiki>**</nowiki> Record by number of total medals  – (46 medals in total, 2017) All-time medal table. Updated after the 2019 World Aquatics Championships. Multiple medalists. Boldface denotes active athletes and highest medal count per type. Disciplines. Except as noted below, there are male and female categories for each event. Diving. Men's and women's events: Mixed events added at the 2015 World Aquatics Championships: High diving included since the 15th FINA World Aquatics Championships in 2013 in Barcelona Open water swimming. Open water swimming was first held at the 1991 FINA World Championships. Synchronized swimming. Except for Free Combination and Highlight, all events include technical and  free routines, with medals awarded separately.