Flacinus, Flacino, or Flagino was the Bishop of Oviedo between 909 and 912, possibly from as early as 907 until as late as 914. His predecessor was Gomelo II

Gomelo II

Gomelo II was the Bishop of Oviedo during the final years of the reign of Alfonso III of Asturias. He succeeded Hermenegild I probably about 892. Only one document from his episcopate survives, though it was interfered with at a later date by Pelagius of Oviedo...

 and he first appears in a document of the latter's episcopate, on 20 January 905, signing as both a presbyter

Presbyter

Presbyter in the New Testament refers to a leader in local Christian congregations, then a synonym of episkopos...

 and a primicerius ("Flacinus presbyter, Primicerius testis"). The earliest evidence of his episcopate is a pair of charters for Sahagún

Sahagún

Sahagún can refer to:*Sahagún, Spain, a town and monastery in Léon, Spain. Cradle of the Mudéjar architecture*Sahagún, Córdoba, the second town in population in Córdoba Department, Colombia, also called "The Cultural City of Cordoba"People...

 (dated 28 April and 28 May 909) in which he signs as Placinius without reference to his see. In 912 when García I

García I of León

García I was the King of León from 910 until his death and eldest of three succeeding sons of Alfonso III the Great by his wife Jimena....

 made a donation to San Ciprián Flacinus signed as a witness, but again without reference to his see.

On 24 October 912 Flacinus—this time clearly identified by his diocese—received a generous gift from Alfonso IV

Alfonso IV of León

Alfonso IV , called the Monk, was King of León from 925 and King of Galicia from 929, until he abdicated in 931....

: villages, estates, ornaments of gold, silver and marble, and books. This charter has been dated incorrectly to 914. A document of 27 May 912 in the Libro de los Testamentos that cites Flacinus is a twelfth-century forgery of the bishop Pelagius

Pelagius of Oviedo

Pelagius of Oviedo was a medieval ecclesiastic, historian, and forger who served the Diocese of Oviedo as an auxiliary bishop from 1098 and as bishop from 1102 until his deposition in 1130 and again from 1142 to 1143. He was an active and independent-minded prelate, who zealously defended the...

, not as it claims of a certain bishop Hermenegild. Flacinus's successor, Oveco

Oveco (Bishop of Oviedo)

Oveco was the Bishop of Oviedo from 913/4, whose episcopate lasted almost half a century. Despite his longevity he is a relatively obscure figure. His origins lie in the same landed and wealthy aristocratic family as those of the Count Piniolo who founded the monastery of San Juan Bautista de...

, was in power by 914.