Sinibaldo Doria (Latin: Sinibaldus ab Auria, 1664 – 1733) was a Catholic cardinal who served as officer of the Papal States and as Bishop of Benevento from 1731 to his death.

On 13 July 1690 he was made Referendary of the Tribunals of the Apostolic Signature of Justice and of Grace,[3] and immediately he was appointed as Governor of Tivoli where in 1691 he successfully faced the cases of plague coming from Naples.

The period was extremely difficult, due to the War of the Spanish Succession in which he was encharged to send secret information to Rome and in Spain.

[2] He was consecrated bishop the following 3 January 1712 by the Cardinal Secretary of State Fabrizio Paolucci in the Roman church of Santo Spirito in Sassia.

[4] As head of the Ospedale di Santo Spirito in Sassia he offered four rooms of his apartment to host the Biblioteca Lancisiana, a new founded library focused on medical studies.