This thesis presents a proposal for a project-based learning related to the Baroque sacral art in Zagreb, which is taught in secondary schools. The project course is divided into two phases: classroom study and field course, in which students deliver a short presentation on the selected work of art. The first phase of the project course is a classroom study in which two topics are taught in two lessons: The space of a Baroque church on the example of St. Catherine of Alexandria in Gornji grad and Baroque sacral iconography in the Church of the Visitation of the Blessed Virgin Mary in Dolac in Zagreb. This phase of the project course is conceived as an introduction to the issue of Baroque sacral iconography, which will help students in writing their essays and making their presentations for the field course. In addition to this, the first lesson refers to the interior of baroque churches, which is an integral part of this project course and an important part of a complete processing of any material related to the Baroque sacral art, therefore it is covered in the first lesson as an introduction to this project course. The second phase of the project course is a field course, before which students should be divided into groups and jointly research one selected topic. Within each topic there are several subtopics and each of the students in the same group needs to write an essay about their subtopic. Furthermore, students should design a presentation together, which will then be presented during the field course. The field course is held in the churches of St. Catherine of Alexandria in Gornji grad and St. John the Baptist in Nova Ves, and in the Zagreb Cathedral’s Treasury. Students will have to prepare for their presentations by reading relevant literature before the second phase of the project course. The objective of this project course is to use the examples of Zagreb's Baroque sacral heritage to cover four subtopics within the main topic »Art and spirituality« prescribed by the Curriculum in secondary schools, as well as achieving the final result of this project course, which are the students’ presentations in the field. During the project course, in addition to factual knowledge and the student's cognitive abilities, their creativity and critical thinking will be developing as well.