Silvanus (14) , first known bp. of Calahorra. We know of him from 2 letters of Ascanius, bp. of Tarragona, and the bishops of his province to pope Hilary, and Hilary's reply dated Dec. 30, 465 (in Migne, Patr. Lat. lviii. 14). The first letter shows that Silvanus had, 7 or 8 years before, consecrated a bishop without any request from the places comprised in his see or the approval of Ascanius. The other bishops of the province were satisfied with admonishing him, and received the new bishop; but the see in question being again vacant Silvanus had lately repeated the act, with the aggravation that the priest consecrated belonged to the diocese of another bishop, and the other bishop at the instance of the bishops of Saragossa having refused to join, Silvanus had performed the consecration alone. In the second letter the bishops express their surprise at the pope's delay in answering. His reply was remarkably favourable, in consequence probably of letters from people of rank and property at Calahorra, Tarazona, and neighbouring towns, which alleged in excuse for Silvanus that his were not the only irregularities, bishops having been consecrated for other cities without the previous approval of the metropolitan. The pope in consideration of the troubled times granted an amnesty for the past, while enjoining strict observance of the canons for the future. As the first letter was written some time before Hilary's reply, Silvanus probably became bp. c. 455. Esp. Sag. xxxiii. 128; Gams, Kirchg. von Sp. ii. (1) 430.
[F.D.]