The paper aimed to focus on moldings, one of the spatial components of San Carlo alle Quattro Fontane Church, and to identify their morphological characteristics. This will lead to insights into the spatial effects of molding. Consequently, to consider such effects, “entablature,” “arch” and “dome base,” which comprise a combination of individual moldings, are defined as “complexes of moldings” in this paper. The shadows and lights on moldings inside of the San Carlo Church are observed and compared with its sections taken from Borromini’s drawings and a section from “Insignium Romae templorum prospects.” The morphological characteristics of moldings are analyzed by comparing them with sections of moldings extracted from Borromini’s drawings and the section of the San Carlo Church included in the “Insignium Romae templorum prospects.” This study of the San Carlo Church’s moldings is expected to contribute to a better understanding of the “method of handling space” suggested by Borromini.
IKEZAWA et al. (2025) studied this question.