Jesuit Classical Gymnasium with right of public (Croatian: Isusovačka klasična gimnazija s pravom javnosti, IKG) is a private Catholic gymnasium secondary school, located in Tvrđa, the historic core of Osijek, Croatia.

On 25 June 1998 the school received permission from the Croatian Ministry of Science, Education, and Sports to open as a classical, 4-year gymnasium.

Teaching took place in several locations like the Jesuit residence in Osijek and in a space at Gymnasium II.

This includes learning the Latin and Greek language and culture throughout the four years and studying the ancient literature.

The school aims to develop broadminded "men and women for others"[3] who are also firm in their faith and respectful of people with other beliefs, open to dialogue.