The Eleventh Gymnasium (Croatian: Jedanaesta gimnazija) is a public secondary school in Zagreb, Croatia, established in 1926.

[2] The building which the school currently is located inside was constructed in 1937, by the Catholic women's order Sisters of Charity (Croatian: Sestre Milosrdnice).

During World War II, it temporarily served as a hospital for the wounded, housing up to 300 soldiers and civilians.

Šuvar was a prominent Croatian politician and sociologist and member of the communist party who greatly influenced the education system of 1970s Yugoslavia.

[4] In 1991, the newly fledged nation of Croatia renamed it to the Eleventh (although better known in its roman numeral form, XI) Gymnasium.