The set contains the stamps issued by Slovenia and Croatia to mark Anniversary of the Battle of Lissa.
The set includes all stamps issued between 2017 and 2021 in the Architecture in Slovenia series.
The set contains 10 stamps from the Road Vehicles series issued between 2001 and 2011 (excluding 2002).
Joint issue dedicated to the Slovene and Serbian composer Davorin Jenko. The stamps were issued in 2015.