Who knocked out Celtic in the European cup in 1968?

Celtic was knocked out of the European Cup in 1968 by the Italian club, FC Internazionale Milano (Inter Milan). In the quarter-finals, Celtic lost the two-legged tie with a score of 2-1 on aggregate. The first leg, played in Glasgow, ended in a 1-0 defeat for Celtic, and the second leg in Milan concluded with a 1-1 draw.