Amsterdamsche Football Club Ajax , also AFC Ajax or Ajax Amsterdam, is a Dutch professional football club based in Amsterdam. Historically, Ajax (named after the legendary Greek hero) is the most successful club in the Netherlands, with 33 Eredivisie titles and 18 KNVB Cups. It has continuously played in the Eredivisie, the Dutch football top division, since its inception in 1956 and, along with Feyenoord and PSV Eindhoven, it is one of the country's "big three" clubs that have dominated that competition.