The three brothers, who died in Co Cork last week, have been described as lovable and full of fun.
Hundreds of people turned out in Charleville this afternoon for the funeral of Thomas, Paddy and Jonathan O'Driscoll.
Their bodies were discovered last Thursday evening, after an apparent case of murder suicide.
Large crowds packed into the Holy Cross Church in Charleville for their requiem mass, which began at midday.
A miniature horse drawn caravan and pony, which was bought as a present for the twins on the day they died, was brought to the church displaying photographs on the three brother.
The chief mourners included the boys parents Thomas and Helen, their younger brothers Jimmy and Martin and their sister Bernadette, who paid an emotional tribute to her brothers:The town of Charleville came to a standstill, with all businesses closing and people standing along the streets, as Thomas and Patrick's two white coffins were carried to the local Holy Cross cemetery.
Jonathan O'Driscoll coffin was driven to Kilmallock cemetery in Co Limerick, where he was laid to rest beside his mother's parents.
The bodies of Thomas and Paddy were discovered at their home, pictured below, on the outskirts of Charleville last Thursday evening.
The body of their brother 21-year-old Jonathon was discovered around an hour later 15 kilometres away in a woodland in Buttevant.
Gardai are treating the case as a murder suicide.
Fr Tom Naughton, the Chief Celebrant at the mass, says exactly what happened will never be known:
