Fr Jacques Clemens took Mass at St. Benedict's Church (below) in Nalinnes in south-eastern Belgium up until last year.
He ministered as a priest for more than 80 years and still worships at the church.
The priest was due to retire aged 75 but was asked to stay on until a replacement could be found - he was still ministering 36 years later.
Asked what he believed was the secret to his long life, Fr Clemens told Reuters it was a strict daily routine.
He wakes up at 5:30am every day and goes to bed at 9pm.
An Irish priest in Liverpool is hot on Fr Clemens' record as the oldest priest in the world.
Fr Thomas Kennedy turned 100 earlier this month - and has no plans of retiring.
