Sebastián de Vivanco was a Spanish priest and composer of the Renaissance. Vivanco was born in Ávila, like Tomás Luis de Victoria; however, the exact date of his birth is unknown. It is hypothesized that he was born a few years after Victoria and that they both knew each other as children and sang together at the chapel of the Cathedral of Ávila. During the time that Vivanco sang in the chorus, the maestri di cappella were Gerónimo de Espinar, Bernardino de Ribera (1559) and Juan Navarro Hispalensis (1563). This last composer had the most profound influence on Vivanco. After 1566, with the change in his voice, Vivanco commenced studies as a priest, as Victoria had done.