The Roman Catholic Church traditionally venerates three named archangels: Michael, Gabriel, and Raphael.
Their feast is celebrated together on September 29, the Feast of the Archangels. Michael is associated with defending God’s people and defeating evil; Gabriel is the messenger who announces major events, including the births of John the Baptist and Jesus; Raphael appears in the Book of Tobit as a guide and healer.
The number three reflects the archangels whose names and roles are accepted in Catholic liturgical tradition. Catholic teaching does not claim that only three angels exist, or that there are only three archangels in all religious traditions. The Bible and later traditions also discuss unnamed heavenly beings and different angelic orders.
Seven is a common alternative because several Jewish, Christian, and esoteric traditions speak of seven archangels. However, in Roman Catholic public devotion and the liturgy, the traditionally venerated named archangels are Michael, Gabriel, and Raphael.