This is the 40th anniversary of the organisation and Knights from all over the UK attend this special event.
Bishop of Motherwell Joseph Toal celebrated the Mass, assisted by deacons Jim Aitken and Joe Gallagher.
Ordained as a priest in 1610 St John was arrested in 1614 and subsequently hanged and drawn at Glasgow Cross in 1615.
Having been beatified in 1929, Pope Paul VI canonized St John in 1976 and is the only Scottish martyr to have gone through the formal canonization process.
The Church in Scotland and the Society of Jesus observe John’s feast day on March 10, the day of his martyrdom.