Based on its cultural and historic heritage, Rijeka is an open city and this fact is supported by many activities promoted by the City of Rijeka, in particular those tied to cooperation with cities – friends and membership and cooperation with international associations.

Membership and cooperation with international associations in strategic development projects enable the City of Rijeka as well as institutions, companies and partners of city administration to take part in projects funded by the EU that are implemented by the city administrations of the sister cities.

Friendship and cooperation agreements between sister cities enable them to start a number of common initiatives with the aim of encouraging economic cooperation and cooperation in the field of culture, tourism, education, port and port activities development, public and private investments to the benefit of its citizens.