Mark Pivarunas

His Excellency, the Most Reverend Mark Pivarunas CMRI.
Superior General of the Congregation of Mary Immaculate Queen
Orders
Ordination	27 June 1985 by George Musey
Consecration	September 24, 1991 by Moisés Carmona
Personal details
Born	(1958-10-31) 31 October 1958 (age 59) Chicago, Illinois
Nationality	American
Denomination	Sedevacantist Roman Catholic

Styles of Mark Pivarunas
Reference style	His Excellency The Most Reverend
Spoken style	Your Excellency
Religious style	Bishop

Mark Anthony Pivarunas, CMRI (born October 31, 1958) is a U.S. based sedevacantist and traditionalist Catholic bishop and Superior General of the Congregation of Mary Immaculate Queen.

Pivarunas was born to his father, Walter Pivarunas, and an ethnic Italian mother in Chicago, Illinois. He has three brothers and a sister. He entered the religious life in September 1974, entering the Congregation of Mary Immaculate Queen and taking the religious name Brother Mary Tarcisius. He made his final profession on September 12, 1980, at CMRI's headquarters at Mount Saint Michael in Spokane, Washington. In May 1984, Pivarunas was among the clergy who removed Bishop Francis Schuckardt, founder of the CMRI, under controversial circumstances. On April 23, 1985, after some time without a clear leader, Pivarunas and the clergy met with Bishop George Musey (an independent, Thuc line bishop), who agreed to advance Pivarunas and two others to the priesthood on June 27, 1985. Bishop Musey's connections with Mount Saint Michael were limited after that.

The priests concluded that, while it was important to dispense the Mass and sacraments, the condition of sedevacantism (Sede vacante, the empty papal see) in the Roman Catholic Church resulted in a vacuum of canonical ecclesiastical authority. A coalition of the priests elected the 30-year-old Pivarunas to the post of Superior General of the Congregation of Mary Immaculate Queen in August 1989.