Kantakuzina Katarina Branković Serbian Orthodox Secondary School

The Kantakuzina Katarina Branković Serbian Orthodox Secondary School, abbreviated as SPOG, is a coeducational gymnasium (analogous to a preparatory high school or grammar school) affiliated with the Metropolitanate of Zagreb and Ljubljana. It is situated in Zagreb, capital city of Croatia, and stands as one of only two non-seminary high schools of the Serbian Orthodox Church.