The thesis paper deals with the topic of Gothic windows in the historical centre of the city of Split. A brief historical overview of the city and its medieval development is also given. Even though some windows have been published and processed within the research of certain buildings, a large number of them have not been documented anywhere. A catalogue of them does not exist, nor has their typology been researched at the city level. In this paper, almost all Gothic windows in the residential architecture of the city of Split are documented. They have been catalogued, which includes photo documentation, indicating location and cadastral parcel of the building, as well as the position of the windows on the building, recording the condition of the windows, providing a bibliography and a detailed description of the windows. Using the method of comparative analysis, the types of windows and typological characteristics of Gothic windows in Split and their elements, their similarities, and differences were determined. The paper also includes a Glossary containing numerous names and definitions of architectural and decorative elements found on these windows.