Croatia's rivers belong to the Adriatic and the Black Sea basin. The rivers in the interior are large and calmer (Sava, Drava, Danube).
For many people, Catholicism is a symbol of nationality even though they may not attend mass or participate in other religious activities or ceremonies. Most young people are baptized, and most marriages are conducted in a church. Other religions include Eastern or Serbian Orthodox, Islam, Judaism, and Protestantism. Since the war, there has been a more visible presence of Protestant missionaries, including members of the Church of the Latter Day Saints and Jehovah's Witness. There is some interest in Eastern religions, such as Buddhism, among young adults.
Croatia was one of the six republics of the former Yugoslavia.