This study summarizes recent findings concerning the archive of the Fr. A. Urbánek and Sons publishing house, which has for many years been considered lost, and focuses especially on the portion thereof preserved in today’s Institute of Musicology of the Charles University Faculty of Arts in Prague. This collection is compared with documents deposited in the Czech Museum of Music (of the National Museum) and the Literary Archive of the Museum of Czech Literature that may also have been part of the publisher’s original archive. The comparison shows that the Charles University collection is far from being so insignificant as has been thought, and could be a remarkable source of information not only for musicologists.