Archbishop Diarmuid Martin of Dublin said he would no longer send students to the national seminary at Maynooth amid allegations of inappropriate sexual behaviour.
The archbishop referred to allegations of what he described as a "gay culture" in the seminary and further allegations that some seminarians have been using a gay dating app.
The archbishop said he was "somewhat unhappy about an atmosphere that was growing" at St Patrick's College, Maynooth, saying he felt it was not the healthiest place for his students to be.
