The topic will be the basis for the students who are expected to develop ICT skills, to create wood or cardboard models, presentations, posters and other multimedia content, to get to know castles in their countries. Students will explore and present Croatian and European castles and fortresses, their architecture and specialties through teaching mathematics, history, technical culture, fine arts, religious studies, computer science, English and German. Knowledge of geometric bodies will be productively applied in the creation of models of famous Croatian castles, churches, cathedrals, monasteries and other buildings as significant parts of our heritage.They will explore castles and fortresses through a variety of subjects in an interactive way.Through research work and collaboration with other students in the project, she will get to know her and others' cultural heritage and nurture the importance of preserving cultural heritage.