The collection holds one thousand four hundred and seventy eight old picture postcards of Dubrovnik and surroundings (the territory of the former Dubrovnik Republic), created from the end of the 19th century until the most recent times. Particularly prominent are several very valuable and rare examples of the earliest known picture postcards of Dubrovnik, done in lithography (chromolithography) and photogravure. There are postcards from almost all the most important publishers in Dubrovnik (Wiess, the Nikoletić Bros, Tosović, Kulišić, Bogišić, Damiani and others) as well as very high quality specimens issued by well-known international publishers, particularly in the first decades of the 20th century, when Dubrovnik was rapidly making ground as a tourist destination.

In the light of the diversity of subjects and the temporal span, the collection is very valuable for documenting the rapid town planning changes in Dubrovnik and environs.

The collection is open and is constantly growing on the basis of donations and purchases, which are made according to criteria of territorial affiliation, collecting value and the motifs represented, as well as for their importance for the documentation of the rapid town-planning changes.