The Archbishop of Glasgow Philip Tartaglia and Glasgow Cathedral minister Laurence Whitley will read from Vita Kentigerni – the life of St Mungo written by Jocelyn of Furness – in the Mitchell Library between 12.30pm and 1pm on Saturday.
A facsimile of the work will be on display until 4pm.
The Glasgow Russian children's choir will perform with members of the St Mungo Singers, giving a taste of the opening of medieval vespers, or evening prayers.
St Mungo, who founded Glasgow, was one of the most important figures in the church in the 6th and early 7th centuries.
A St Mungo service will be held in the cathedral on Sunday at 6.30pm.
The annual service, first held five years ago, celebrates the saint's life. It is organised by Glasgow Churches Toget-her and Glasgow Cathedral with city council backing.
Church leaders say the service brings together representatives from all areas of the city's life to pray for Glasgow's wellbeing.
On Thursday, the invitation-only Molendinar Lecture will be held in the City Chambers. And on Friday the council HQ will host Mungo's Bairns, when children from seven primary schools tell St Mungo's life in song and dance.
At noon on Sunday, Archbishop Tartaglia will celebrate a Mass of St Mungo in St Mungo's Church, Townhead. The parish clergy and local community welcome people from across the city to the annual event.
On January 14, there will be a dedication of youth in the city at noon in Glasgow Cathedral which will be attended by pupils from the city's Whitehill Secondary and St Mungo's Academy.
The celebrations end on January 19 when the Friends of Glasgow Cathedral hold a service St Mungo's tomb.
Mungo's four religious miracles in Glasgow are represen- ted in the city's coat of arms.