Olympiakos Fans at Emirates Stadium, London - Arsenal vs Olympiakos 3:1, Champions League 2012 Olympiacos F.C. (Greek: ΠΑΕ Ολυμπιακός), also known simply as Olympiacos, Olympiacos Piraeus or with its full name Olympiacos C.F.P. (Greek: Oλυμπιακός Σύνδεσμος Φιλάθλων Πειραιώς, transliterated "Olympiacos Syndesmos Filathlon Piraios"), Olympiacos Club of Fans of Piraeus, is a Greek association football club, part of Olympiacos CFP, based in Piraeus. Olympiacos is the most successful club in Greek football history, having won a record 40 League titles, a record 26 Greek Cups, a record 16 doubles and a record 4 Greek Super Cups (a total record of 70 national titles). Olympiacos' dominating success is further signified by the fact that all the other Greek clubs have won a combined total of 37 League titles. It is one of three clubs to have never been relegated from the top flight of Greek football; in European competitions, they have reached the quarter-finals twice, in the 1998--99 UEFA Champions League and the 1992--93 European Cup Winners' Cup. Olympiacos is also one of the founding members of the European Club Association. The club's stadium is the Karaiskakis Stadium in Piraeus. Olympiacos is the most popular Greek club with around two and a half million fans in Greece and was placed ninth on the list with the most paid up members in the world in 2006, having 83,000 registered members as of April 2006. They share a great and long-standing rivalry with Panathinaikos, with whom they contest the derby of the eternal enemies. Arsenal Football Club is an English Premier League football club based in Holloway, London. One of the most successful clubs in English football, it has won 13 First Division and Premier League titles and 10 FA Cups. Arsenal holds the record for the longest uninterrupted period in the English top flight and would be placed first in an aggregated league of the entire 20th century. It is the second side to complete an English top flight season unbeaten (in the 2003--04 season), and the only one to do so across 38 matches. Arsenal was founded in 1886 in Woolwich and in 1893 became the first club from the south of England to join the Football League. In 1913, it moved north across the city to Arsenal Stadium in Highbury. In the 1930s the club won five League Championship titles and two FA Cups. After a lean period in the post-war years it won the League and FA Cup Double, in the 1970--71 season, and in the 1990s and first decade of the 21st century won two more Doubles and reached the 2006 UEFA Champions League Final. Arsenal has a long-standing rivalry with North London neighbours Tottenham Hotspur, with whom it contests the North London derby. Arsenal is the fourth most valuable association football club in the world as of 2013, valued at over $1.3 billion.