Marathon world record progression races were first held in 1896, but the distance was not standardized by the International Association of Athletics Federations (IAAF) until 1921. The actual distance for pre-1921 races frequently varied slightly from the present figure of 42.195 km (26 miles 385 yards). In qualifying races for the 1896 Summer Olympics, Greek runners Charilaos Vasilakos (3:18:00) and Ioannis Lavrentis (3:11:27) won the first two modern marathons. On April 10, 1896, Spiridon Louis of Greece won the first Olympic marathon in Athens, Greece in a time of 2:58:50; however, the distance for the event was reported to be only 40,000 meters. Three
Lisbon Half Marathon architecture, including the Belém Tower and Jerónimos Monastery. From 2008 onwards, the organisers set aside a €50,000 prize pot for any athlete breaking the world record over the half marathon distance. This led to the participation of a number of prominent athletes, with marathon world record holder Haile Gebrselassie winning the 2008 edition, while Charles Kamathi and Robert Kipkoech Cheruiyot followed behind. Another strong field was assembled in 2010 and Zersenay Tadese of Eritrea broke both the 20 kilometres and half marathon world records in his winning run. The competition also hosts a mini marathon race, which has featured many