Valentino da Camerino is the only one of the teachers of Thomas de Vio Cajetan to be expressly mentioned by any of Cajetan's earliest biographers. Indeed, he is mentioned by only one of these, Bartolomeo Spina da Pisa. Spina had been commissioned by Cajetan to oversee the publication of the first edition of his commentary on the Pars Secunda Secundae of Aquinas's Summa Theologiae. When the work appeared on 20 August 1518, it included a preface by Spina which is largely biographical in content and laudatory in tone. The reference to Valentino as having been Cajetan's teacher was clearly intended as a compliment to Cajetan and testifies to the kind of reputation that Valentino must have enjoyed even after his death in 1515.