 The archdiocese has its own diocesan college seminary, the San Jose de Mindanao Seminary that opened in 1955.It was constructed by Archbishop Hayes, was first administered by the Jesuits, then by Columban priests, and now by the diocesan clergy.Also within the archdiocese is a theology seminary - the St. John Vianney Theological Seminary, which is mainly for seminarians of the Ecclesiastical Metro Cagayan de Oro.