Celtic F.C. their sixth successive league title on 2 April 2017, with a record eight league games to spare. As Celtic's unbeaten domestic run continued, they subjected Rangers to their heaviest defeat at Ibrox since 1915, 5–1, on 29 April. Celtic's 2–0 win over Hearts on 21 May saw them finish 30 points ahead of second-placed Aberdeen in the league, with a record 106 points, and the team became the first Scottish side to complete a top-flight season undefeated since Rangers in 1899. On 27 May 2017, Celtic clinched their fourth treble by defeating Aberdeen 2–1 in the Scottish Cup final. The
Celtic League for the return of ancient artefacts, removed from Celtic countries to museums outside of these areas – amongst these are the Lewis chessmen and the Chronicles of Mann. The Manx branch of the Celtic League successfully campaigned for the Calf of Man island to be transferred from the National Trust for Places of Historic Interest or Natural Beauty in England to the Manx National Heritage. In the mid-1990s, the Celtic League started a campaign to have the word "Alba" on the Scottish football and rugby tops. Since 2005, the Scottish Football Association have supported the use of Scottish Gaelic on