Panathinaikos B.C., also known simply as Panathinaikos, or by its current name Panathinaikos B.C. OPAP for sponsorship reasons, is the professional basketball team of the major Athens-based multi-sport club Panathinaikos A.O. It is owned by the billionaire Giannakopoulos family. The parent athletic club was founded in 1908, while the basketball team was created in 1919, being one of the oldest in Greece. Alongside Aris, they are the only un-relegated teams with participation in every Greek First Division Championship until today. Panathinaikos has developed into the most successful basketball club in Greek basketball’s history, and one of the most successful in European basketball, creating its own dynasty. They have won six EuroLeague Championships, thirty-nine Greek Basket League Championships, nineteen Greek Cups, one Intercontinental Cup, one Greek Super Cup and two Triple Crowns.