Memoriæ sacrum Typographia Ars artium omnium Conservatrix Hic primum inventa Circa annum MCCCCXL.
Sacred to the memory of printing, the art preservative of all arts. This was first invented about the year 1440. Inscription on the façade of the house once occupied by Laurent Koster at Harlem. "The art preservative of all arts," probably taken from this.