A First Edition Issued by the First Printer in Cologne (INCUNABULA). GERSON, JOHANNES. DE MEDITATIONE CORDIS; DE ORATIONE ET VALORE EIUS; EXPOSITIO SUPER SEPTEM PSALMOS POENTITENTIALES. [Cologne: Ulrich Zel, ca. 1470]. Price: $9,500.00 Add to Cart Add to Wish List Ask a Question