American swimmer Caeleb Dressel heralded a new era in world swimming when he equalled the great Michael Phelps's feat of seven golds at a single world championships as the 17th edition closed.
The 20-year-old Dressel underlined his credentials as the world's fastest starter in breathtaking fashion at the Duna Arena when he broke away on the butterfly leg to give the US gold in the men's 4x100 metres medley relay.
Dressel had already won three individual golds and three relay titles in Budapest and Sunday's addition allowed him to match his compatriot Phelps's tally from the 2007 championships in Melbourne.
He also helped the US to record their best-ever world championship haul, with 38 medals.
Team mate Lilly King had kickstarted the evening in blistering style with a world-record time of 29.40 seconds in the women's 50m breaststroke.
King beat Russian Yuilya Efimova to the wall by 0.17 seconds, with another American, Katie Meili taking bronze.
The atmosphere rose when Hungary's Katinka Hosszu glided to gold in the women's 400m individual medley, adding to her 200m medley title.
The 12,000-strong crowd roared Hosszu on to a championship record time of four minutes 29.33. Mireia Belmonte of Spain won silver, with Canadian Sydney Pickrem claiming bronze.
Chase Kalisz's breaststroke leg in the men's 400m individual medley also saw him land an individual medley double.
The American set a championship record of four minutes 5.90 seconds to become the third-fastest performer behind Phelps and Ryan Lochte.
David Verraszto of Hungary won silver, with Japan's Daiya Seto securing bronze.
Swede Sarah Sjostrom won her third individual gold in the women's 50m freestyle to wrap up a memorable championships which also included two world records.
The 23-year-old paced herself perfectly to hold of Ranomi Kromowidjojo of the Netherlands in 23.69 seconds. Simone Manuel of the US won bronze.
Camille Lacourt of France delivered the perfect hors d'oeuvre for his new life as a Paris restaurant owner by blazing his way to a hat-trick of men's 50m backstroke world golds.
Lacourt, 32, bowed out of the sport in style as his 24.35 seconds saw off Japan's Junya Koga and Matt Grevers of the U.S. into the minor medals.
King and Manuel then helped the US to set a world record on the way to women's 4x100m medley relay gold.
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