Croatia's parliament adopted a law recognising Islam as an equal religion in the country on April 27, 1916, four years after Austria. By comparison, Belgium recognised Islam in 1974 and Spain in 1992.
A number of events have been organised to mark this centennial jubilee throughout Croatia.
According to the latest census, 62,977 Croatian citizens declared their religious affiliation as Muslim.
Broken down by ethnicity, the majority of the 62,977 Islamic believers are Bosniaks (27,959), followed by Croats (9,647), Albanians (9,594), and Roma (5,039), while 6,704 identified themselves as ethnic Muslims.
The Muslims religious community in Croatia is organised in 15 majlises, territorial units comprised of jamaats. The highest religious and administrative body of the Islamic Community in Croatia is Meshihat, led by Mufti Aziz Hasanovic.
Other important institutions are the Islamic High School in Zagreb and the Halal Centre, an institution that certifies products prepared in accordance with religious principles.
Regardless of their ethnicity, Muslims are an integral part of Croatia's religious, cultural and national identity, sociologist Ivan Makresic.
They proved their patriotism with decisive and mass-scale inclusion in the defence forces during the 1990s Homeland war, Mufti Hasanovic said recently, adding that 25,000 Muslims participated in the war of whom 1,180 were killed.