Pope Liberius (310 – 24 September 366) was Pope of the Catholic Church from 17 May 352 until his death on 24 September 366. According to the Catalogus Liberianus, he was consecrated on 22 May as the successor to Pope Julius I. Liberius is mentioned in the Greek Menology, the Eastern equivalent to the martyrologies of the Western Church and a measure of sainthood prior to the institution of the formal Western processes of canonization.
|Papacy began||17 May 352[a]|
|Papacy ended||24 September 366|
|Died||24 September 366|
|Feast day||27 August|
|Venerated in||Catholic ChurchEastern Orthodox Church|
- The Liberian Catalogue lists the date of Liberius's consecration as 22 May. Catholic Encyclopedia gives 17 May, noting that the 22nd was not a Sunday. The date could also be 21 June, a Sunday, which differs from 22 May by only one letter in the Roman calendar (XI Kal. Jun/Jul.)