Olympiad of the games are so scanty that historians are not certain whether after 261 they were still held every four years. During the early years of the Olympiad, any physical benefit deriving from a sport was banned. Some winners were recorded though, until the last Olympiad of 393AD. In 394, Roman Emperor Theodosius I outlawed the games at Olympia as pagan. Though it would have been possible to continue the reckoning by just counting four-year periods, by the middle of the 5th century AD reckoning by Olympiads had become disused. The modern Olympiad is a period of four years, beginning
International History Olympiad assigned to teams for the team events at the Olympiad based on a number of factors, though every effort is made to keep students from the same country or state together. Teams consist of either 2 or 3 students. For team events, if a "mixed" team wins a medal, the medals are credited fractionally on the medals table depending on how many students from a state or country were on the team. After 2016, the Olympiad became a biennial model; Olympiads thus occur in even-numbered years. The location of the 2020 International History Olympiad has yet to be determined, though