Baroque period was fundamentally different from the previous ages in terms of various aspects. Not only the social, economical, and cultural changes, but also ways of experiencing architectural space were essentially changed. Space in Baroque architecture was no more confined in the strict medieval order and proportions, but it became more flexible and dynamic by applying many interesting spatial concepts as well as design methods. That is why Baroque architecture somehow has been re-considered in the present time. Various contemporary architects and theorists attempt to apply ideas in the Baroque architecture to enhance and rich spatial experience. This thesis aims to study the methods of constructing spatial depth in some of Baroque architecture. First of all, theoretical research on the Baroque art in terms of depth expressions compared to the previous ages based on Heinrich $W{ddot{o}}lfflin$ was mentioned. After explaining the general concepts and methods of spatial depth in Baroque architecture, two case buildings were selected to be further analyzed. They are San Carlo alle Quattro Fontane and Cappella di Santissima Sindone. They have unique ways of expressing the spatial depth in which people experience particular spatial feelings. Based on the case analysis, this study was concluded that the ideas as well as design methods for spatial depth can be applied in contemporary architectural designs in various ways.