has any scottish team won back to back trebles
List of Scottish football champions 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.[7] 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.[8] Each club has also won a Double and added the Scottish League Cup to make it a Treble.[9] In the 1966–67 season Celtic took all three domestic trophies and also won the European Cup to complete the only Quadruple to date.[10]