The list of modern fan conventions for various genres of entertainment extends to the first conventions held in the 1930s. Some fan historians claim that the 1936 Philadelphia Science Fiction Conference, a.k.a. Philcon, was the first science fiction convention ever held. Others, such as Fred Patten and , make this claim for the January 1937 event in Leeds, England, organized by the Leeds Science Fiction League, which was specifically organized as a conference, with a program and speakers. Out of this came the first incarnation of the British Science Fiction Association.