Titulus Regius or Titulus Regis, literally the royal title, the name of a parliamentary decree giving Richard III the throne
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Titulus Crucis, a claimed relic of the INRI inscription on the cross of Jesus
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Titulus, or Titular church, one of a group of Early Christian churches around the edges of Rome
The title was definitively suppressed in 1587 by Pope Sixtus V, who assigned a titulus of Sts Quirico e Giulitta to Cardinal Ferdinando de' Medici.
He was ordained a Catholic Priest in 1728, and made a Cardinal in 1733, given the titulus of San Cesareo in Palatio.