The miniature sheet was issued in 1992 to call attention to national treasures. Clockwise from the upper left: a Hispanic history of Mexico written by Mariano Veitia in the eighteenth century; a massive eighteenth century pictorial record of the diocese of Trujillo by Bishop Baltasar Jaime Martinez Companon; the Chess Book, part of an effort by King Alfonso X to gather all the knowledge of his time, even recreational knowledge; and a page from the Florentine Codex, 1575-1577, compiled by Father Bernardin de Sagahun dealing with botany and the medical use of plants.