It has also produced more NBA league players than any other high school in the world outside of the United States.

The school was founded in 1596 as a Jesuit educational institution located in the town center of Ljubljana, then capital of the Duchy of Carniola.

Later they were merged into a new grammar school, called the "Imperial Royal Gymnasium with German Language of Instruction in Ljubljana".

According to the official statistic of the time, most pupils regarded themselves as ethnic Germans, although some Slovenes also attended the schools.

The building was designed by Emil Navinšek and its static load calculated by architect and civil engineer Sonja Lapajne-Oblak and created as the first corridor-free school.

It also runs a small and merit-based class of the International Baccalaureate with results being consistently among the top 5% worldwide.