They won the League for the fifth season in a row.
They also won the League Cup for the fifth time in a row, something that has never been achieved again as of 2025.
Celtic had one of their most successful European campaigns as they reached the European Cup final for the second time, only to lose 2-1 to Dutch champions Feyenoord.
The final was played at the San Siro in Milan, coincidentally the home of Internazionale, the team Celtic had beaten in Lisbon in the 1967 final.
Wim Jansen, who would manage Celtic decades later in 1997-98 to win a League and League Cup double and deny Rangers their tenth league title in a row, was part of the Feyenoord eleven that defeated Celtic in the final.