Jan Moretus

[3][4] Christophe wrote a letter on 5 November 1570 to Gabriel de Çayas (secretary to Philip II of Spain) about his new son-in-law: A young man quite expert in and with a good understanding of Greek, Latin, Spanish, Italian, French, German, and Flemish who from the time that your Highness was in this country with His Majesty until now, has always served me in both good and bad times, without abandoning me because of any ill-fortune which overtook me or because of the promises or inducements that others were able to make him, even offering him the richest marriages and rewards such as were not within my power to grant him.

For which reason I give her [i.e. Martina] to him, to the great pleasure of all my good Lords, relations and friends who have known this young man while he has been conducting the business of my shop.

[3] Under his management, the company focused on 12mo format for text books, doing away with the smaller handbook (enchiridion) favored under his predecessor.

[4] Some of the notable projects published by Moretus include Benito Arias Montano's Anima, an eight-book series detailing the history of humanity from the Creation through its regeneration with Christ's birth.

For example, he worked with the Flemish scholar Henricus Sedulius during the publication of Bonaventure's The Life of St. Francis (De vita s. patris Francisci).

Printer's mark of Jan I Moretus, found in Henricus Sedvlius, Præscriptiones adversvs hæreses (1606), Openbare Bibliotheek Brugge 1875a (f. *1 recto)
Jan Moretus, portrait by Peter Paul Rubens