The Scottish Premier League was the top-level league competition for professional football clubs in Scotland. The league was founded in 1998, when it broke away from the Scottish Football League (SFL). It was abolished in 2013, when the SPL and SFL merged to form the new Scottish Professional Football League, with its top division being known as the Scottish Premiership. A total of 19 clubs competed in the SPL, but only the Old Firm clubs of Glasgow—Celtic and Rangers—won the league championship.

The Celtic Football Club, commonly known as Celtic, is a professional football club in Glasgow, Scotland. The team competes in the Scottish Premiership, the top division of Scottish football. The club was founded in 1887 with the purpose of alleviating poverty in the Irish–Scots population in the city's East End area. They played their first match in May 1888, a friendly match against Rangers which Celtic won 5–2. Celtic established themselves 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 1967 European Cup. Celtic have played in green and white throughout their history, adopting in 1903 the hoops that have been used ever since.