Christina Vasa, Queen of Sweden (December 8, 1632-April 19, 1689). Daughter of Gustav II Adolf (Gustavus Adolphus) of Sweden, born at Stockholm; died at Rome.Her mother was Maria Eleonora Hohenzollern
Christina abdicated her throne in 1654, openly avowing her previously secret Catholicism, and moved to Rome. Her wealth and former position made her a center of society. She left her large and important library to the popes on her death, and a common cataloging abbreviation in the the Vatican Library is Reg. (or Reginae), meaning the "Queen's collection."