<P> Although there were several short spells when a third division was created, the two - division structure remained largely in place until 1975, when a major re-organisation of the league led to a new three - tier set - up and the creation of a new Premier Division at the highest level . In 1998, the teams then in the Premier Division broke away to form the SPL, which supplanted the Premier Division as the highest level of football in Scotland . The SPL and SFL merged in 2013 to form the Scottish Professional Football League (SPFL), which branded its top division as the Scottish Premiership . </P> <P> Throughout its existence the championship of Scottish football has been dominated by two Glasgow clubs, Celtic and Rangers . The two rivals, who are collectively known as the "Old Firm", have claimed the majority of league titles . As of 2018, Rangers have won 54 and Celtic 49, while no other club has won the title on more than four occasions . No club outside the Old Firm has won the title since the 1984--85 season, when the Aberdeen side managed by Alex Ferguson won the Premier Division . The current period of dominance by the Old Firm is a record; the previous longest streak was 27 years, between 1904 and 1931 . </P> <P> Each of the Old Firm clubs has at one time managed a run of nine consecutive championships, Celtic from 1966 to 1974 and Rangers from 1989 to 1997 . Each of the two clubs has also claimed the Double on many occasions, by winning the league and the Scottish Cup in the same season . As of the start of the 2017--18 season Rangers have won the most Doubles with 18, more than any other club in the world apart from Northern Ireland's Linfield . Each club has also won a Double and added the Scottish League Cup to make it a Treble . In the 1966--67 season Celtic took all three domestic trophies and also won the European Cup to complete the only Quadruple to date . </P> <Table> <Tr> <Td> Club won the Scottish Cup </Td> </Tr> <Tr> <Td> Club won the Scottish League Cup </Td> </Tr> <Tr> <Td> Club won both domestic cups </Td> </Tr> </Table>

Has any scottish team won back to back trebles
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