What title is given to the dignity conferred upon Roman Catholic bishops and/or priests, making them "princes of the church"?

The title given to Roman Catholic bishops and priests that confers upon them the dignity of being "princes of the church" is Cardinal. This title is associated with individuals who have been elevated to the College of Cardinals, which advises the Pope and is responsible for electing the Pope during a conclave. Cardinals often play significant roles in the administration and governance of the Church, and their status reflects a certain level of honor and responsibility within the hierarchy. The term "princes of the church" underscores their importance and influence in the Catholic Church.

Other titles, such as Archbishop and Monsignor, relate to specific roles or honors within the Church but do not carry the same connotation of elevated status and responsibility that comes with being a Cardinal. A Celebrant refers to a priest who celebrates the Mass but does not indicate the rank or dignity of being a "prince" within the Church's hierarchy.