This book belongs to the third quarter of the 15th century, ca. 1470, from the workshop of Wilhelm Vrelant, Bruges, which was active between 1454 and 1482. Queen Doña Leonor, was the wife of John II of Portugal. Considered as one of the great treasures of the National Library of Portugal. It is characterized by the extreme delicacy of the outline of marginal ornamentation, which is never repeated, in which the stylized vegetal motifs, animals, human figures and fantastic, are intertwined in great profusion by the illustrations and the dominant colors of this work: gray, black and gold, grisaille, except for the strong blue of the sky in some scenes.

Title from colophon.

Issued in clamshell box.

Commentary title: As Perfetissimas Horas da Rainha D. Leonor / by Delmira Espada Custódio. Published by Taberna Libraria (Madrid) and A4 Edicions (Andorra) in [2018].

Ms. in Latin ; commentary in Portuguese.

Library owns number 369 of 500 copies.