Since 1968, it has been responsible for almost 900 marriages and more than 48,000 introductions.
Fr Michael Keane, the Co Mayo clergyman who founded Knock Marriage Bureau 43 years ago, has died.
He was 85 years old and originally from Claremorris, Co Mayo.
As a priest in the archdiocese of Tuam, Mr Keane was dubbed 'Ireland's Cupid Priest' by the popular press after founding the Bureau in 1968.
The Marriage Bureau, which is now run by Canon Joseph Cooney, is still prospering, despite the success of other dating agencies.
In the 2000, Fr Keane was reinstated by the then Archbishop Desmond Connell.
The reconciliation came as a great relief to then 75-year-old after more than two decades of feeling shunned and isolated.
Fr Keane will be laid to rest on Tuesday following Requiem Mass at midday in St Colman's Church, Claremorris.
Until now, I always thought people who resort to dating agencies must be a little desperate. I have never before even been set up by friends or been on a blind date.
But then I reached the first anniversary of my divorce and, much to my surprise, having sworn off men for life, I started to wonder, with the prospect of a great big yawning new year stretching ahead of me, whether there might be someone out there for me and, if so, how on earth am I going to find him?