The Kantakuzina Katarina Branković Serbian Orthodox Secondary School (Serbo-Croatian: Srpska pravoslavna opća gimnazija Kantakuzina Katarina Branković, Српска православна општа гимназија Кантакузина Катарина Бранковић), abbreviated as SPOG, is a coeducational gymnasium (e.g. preparatory high school or grammar school) of the Metropolitanate of Zagreb and Ljubljana located in Zagreb, Croatia. It is the only non-seminary high school of the Serbian Orthodox Church in the former Yugoslavia.The school was founded in 2005, continuing a 200-years old tradition of Orthodox minority education in the city. Classes are conducted in Serbian and Croatian language.
The four-year course of study includes Serbian, Croatian, English, German, Latin, Church Slavonic, history, geography, politics, economics, music, art history, the Orthodox religion, sociology, psychology, chemistry, physics, biology, mathematics, physical education, ecology, informatics and philosophy. All courses are required.
Education at SPOG is free; The Serbian Orthodox Church in Croatia covers costs for
all admitted students (disputed). The student body hails from Croatia, Serbia, Bosnia and Herzegovina, Hungary and Moldova; the school is open to anyone who meets the enrollment criteria, regardless of background, religion or nationality. The school is accredited by the Croatian Ministry of Education, and is recognized by other countries in the region. SPOG graduates are studying in Croatia, Serbia, Bosnia, Hungary, Turkey and Russia. The first graduating class was commended at the monastery of the Parascheva of the Balkans in Zagreb on 24 June 2009.