14.06.1891
foundation as Panachaikos Gymnastikos Syllogos
12.02.1923
merger with Gymnastiki Etaireia Patron and renaming to Panachaiki Gymnastiki Enosis
__.__.2004
merger with Patraikos AO and renaming to Panachaiki Gymnastiki Enosis 2005
__.__.2017
renaming to Panachaiki 1891