At a guess 100 metres.
2 ... in women's 100 meter breaststroke swimming and 200 meter breaststroke swimming.
50 meter freestyle 100 meter freestyle 200 meter freestyle 400 meter freestyle 800/1500 meter freestyle* 100 meter backstroke 200 meter backstroke 100 meter breaststroke 200 meter breaststroke 100 meter butterfly 200 meter butterfly 200 meter individual medley 400 meter individual medley 4×100 meter freestyle relay 4×200 meter freestyle relay 4×100 meter medley relay
Amanda Beard appeared in three Olympics and won 7 medals (2 gold, 4 silver, 1 bronze): Gold: 1996 - 4x100 meter medley relay 2004 - 200 meter breaststroke Silver: 1996 - 100 meter breaststroke, 200 meter breaststroke 2004 - 200 meter medley, 4x100 meter medley Bronze: 2000 - 200 meter breaststroke
Through the 2008 Games in Beijing, South Africans have won four Olympic gold medals in swimming. Three of those have been won by women. Penny Heyns won two gold at the 1996 Games in Atlanta in women's 100 meter breaststroke and women's 200 meter breaststroke and Joan Harrison won gold in women's 100 meter backstroke at the 1952 Games in Helsinki. Penny Heyns is the only woman in Olympic history to have won gold in the 100 meter breaststroke and 200 meter breaststroke at the same Games. She also won a bronze medal in women's 100 meter breaststroke at the 2000 Games in Sydney. At one time in the late 1990s she held five of the six breaststroke world records (50 meter, 100 meter, 200 meter).
2 ... both silver ... in 100 meter breaststroke and 4x100 meter medley relay.
Of the 13 men's swimming events at the 1976 Summer Games in Montreal, new world records were set in 12 of them: 100 meter freestyle, 200 meter freestyle, 400 meter freestyle, 1500 meter freestyle, 4x200 meter freestyle relay, 100 meter breaststroke, 200 meter breaststroke, 200 meter butterfly, 100 meter backstroke, 200 meter backstroke, 400 meter individual medley, 4x100 meter medley relay. The only event where a world record was not set was the 100 meter butterfly.
As far as the Olympics go Victor Davis has won 4 medals, the most of any Canadian swimmer. He won gold in the 100 meter breaststroke, setting a world record, and silver in the 200 meter breaststroke and 4x100 meter medley relay at the 1984 Games in Los Angeles and silver in 4x100 meter medley relay at the 1988 Games in Seoul. George Hodgson won gold in 400 meter freestyle and 1500 meter freestyle at the 1912 Games in Stockholm, setting a world record in the 1500 meters. Mark Tewksbury won gold in the 100 meter backstroke at the 1992 Games in Barcelona. Anne Ottenbrite won gold in 200 meter breaststroke, silver in 100 meter breaststroke, and bronze in 4x100 meter medley relay at the 1984 Games in Los Angeles.
No, Leisel Jones is an Australian swimmer that won two silver medals at the 2000 Sydney Olympic Games in 100 meter breaststroke and 4x100 meter medley relay. She also won three Olympic medals at the 2004 Games in Athens, one of which was a gold in the 4x100 meter medley relay. At the 2004 Games, she also won silver in the 200 meter breaststroke and bronze in the 100 meter breaststroke. She will be competing at the 2008 Summer Olympics in Beijing.
Through the 2008 Games, that would be swimmer Penelope Heyns with 2 gold medals. She won gold in the 100 meter breaststroke and 200 meter breaststroke at the 1996 Games in Atlanta.
Rebecca has won three Olympic medals ... a gold in 200 meter breaststroke and silver in 100 meter breaststroke and 4x100 meter medley relay. She won all three at the 2008 Games in Beijing.
1 ... in 100 meter freestyle at the 2012 Paralympics in London. She also won 3 silver medals at the 2012 Paralympics.
The men's world record in the 1500 meter breaststroke is not an official event. The longest distance for the breaststroke in competitive swimming is typically 200 meters.