(restricted to amateurs, international participation, open to all competitors and without handicapping) and now should be considered as Olympic events. In July 2021, the IOC upgraded its complete online database of all Olympic results explicitly to incorporate the data of the Olympic historians website, Olympedia.org, thus accepting Mallon's recommendation (based on four applied criteria) for events of the 1900 Olympic Games. The eleven events, the results of which had nevertheless been shown within the earlier IOC database, have been added over the former total of 85. Оne shooting event (20 metre military pistol, which was an event for professionals) have been removed. Acceptance of Mallon's recommendation increased the number of events to 95, and also entailed increasing the number of participation countries up to 26 and athletes up to 1226. After upgrading of the IOC online database the IOC web site results section contains 95 events. However the IOC webpage for the 1900 Summer Olympics shows a total of 96 (not 95) medal events, 26 participating countries and 1226 athletes. The reason for the discrepancy in the number of events on the IOC webpage is unknown. Furthermore, the IOC factsheet "The Games of the Olympiad" of November 2021 refers to 95 events, but still refers to old numbers of participating countries (24) and athletes (997). C. According to the International Olympic Committee, 26 nations sent competitors to this edition. The concept of "national teams" chosen by National Olympic Committees did not exist at this point in time. When counting the number of participating countries in the early Olympic Games, the IOC does not take into account otherwise unrepresented countries whose citizens competed for other countries. Modern research shows that at the 1900 Olympics, the athletes of at least four otherwise unrepresented countries (Canada, Luxembourg, Colombia, New Zealand) competed for other countries in both individual and team sports. The IOC website lists all of them in the results section under their nationalities, but does not include their countries among the 26 participating countries. D. The IOC webpage for the 1904 Summer Olympics sets the number at 95 events, while at one time the IOC webpage listed 91. The figure of 91 is sourced to a work by Olympic historian and author, Bill Mallon, whose studies have shed light on the topic. Events satisfying all four of these retrospective selection criteria — restricted to amateurs, allowing international participation, open to all competitors