The Celtic Football Club (/ˈsɛltɪk/) is a professional football club based in Glasgow, Scotland, which plays in the Scottish Premiership. The club was founded in 1887 with the purpose of alleviating poverty in the immigrant Irish population in the East End of Glasgow. They played their first match in May 1888, a friendly match against Rangers which Celtic won 5–2. Celtic established itself within Scottish football, winning six successive league titles during the first decade of the 20th century. The club enjoyed their greatest successes during the 1960s and 70s under Jock Stein when they won nine consecutive league titles and the European Cup.
Celtic have won the Scottish league championship on 48 occasions, most recently in the 2016–17 season, the Scottish Cup 37 times and the Scottish League Cup 16 times. The club’s greatest season was 1966–67, when Celtic became the first British team to win the European Cup, also winning the Scottish league championship, the Scottish Cup, the League Cup, and the Glasgow Cup. Celtic also reached the 1970 European Cup Final, and the 2003 UEFA Cup Final.
Celtic have a long-standing fierce rivalry with Rangers, and the clubs have become known as the Old Firm, seen by some as the world’s biggest football derby. The two clubs have dominated Scottish football, winning 102 league titles between them since the inception of Scottish league football in 1890.
The club’s fanbase was estimated in 2003 as being around nine million worldwide, and there are in excess of 160 Celtic supporters clubs in over 20 countries. An estimated 80,000 fans travelled to Seville for the 2003 UEFA Cup Final.