A rector is someone with the authority to lead others in religious worship and services. Rectors conduct mass.
This word originally applied to the leader of a government, but it has evolved to mean a different type of leader: a religious official with the authorization to lead church services and conduct various religious rituals and sacraments. This term is used mainly in Christian congregations. For members of the flock, the rector provides leadership and wisdom, helping them live as followers of their faith.