the archdiocesan classic gymnasium (, often referred to by the abbreviation nkg) is a catholic high school located on 106 voćarska road in the neighborhood of šalata in zagreb, croatia. the school implements a program highlighting the classical culture and history, having students learn the latin and the ancient greek. the school promotes catholicism and serves as a public preparatory school for the interdiocesan boys' seminary, a seminary for future catholic priests located in the same building complex.