BNP, IL165, fl. 62 The dissertation entitled "The light of grisaille. Art, history and liturgy in the Book of Hours ascribed to Queen Eleanor of Portugal -IL165 from BNP" refers to one of the most remarkable manuscripts of the fifteenth century in Portugal. It is the focus of our investigation, involving the historical, artistic and liturgical aspects of its production. The volume is divided into eight chapters. In terms of methodology we started by raising the state of the art and develop a..