The compositional features were considered and the portals of the facades of buildings of the late 19th and early 20th centuries were classified. in Kyiv. Their symbolism, structure and structural construction, stylistics and characteristic architectural and decorative features were studied. The purpose of the study: to investigate and analyze the compositional, stylistic and semantic features of the portals of the facades of buildings of the late 19th and early 20th centuries. in Kyiv, to develop the principles of classification of portals and conduct their classification. Methodology. The research was conducted on the basis of the following methods: empirical, theoretical and empirical-theoretical. The empirical method includes observation, photo-fixation, graphic sketches and constructions, comparisons and generalizations. Theoretical techniques include: going from the abstract to the concrete, abstraction, concretization, identification and separation. Most of the work was carried out using empirical and theoretical methods. The results. Photographs, graphic sketches and classification of building portals of the late 19th and early 20th centuries were carried out. in Kyiv based on the developed compositional-constructive and stylistic principles of classification. It was found that the portals are located mainly on the main compositional axes of the facades of historical buildings, namely on the main vertical divisions, which are highlighted by risalites, bay windows, attics, towers and often changed scale and shape of windows. The role of the portals in the overall composition of the building and the problem of violation of the compositional integrity of the facades due to the replacement or destruction of individual parts and elements of the portals have been revealed. In particular, as a result of unsuccessful repairs and renovations in some buildings of the historical center, the entrance doors were replaced with faceless, rough, unscaled ones, which distorted not only individual facades, but also entire sections of the urban environment. The scientific novelty and practical significance of the research lies in the identification of the compositional and semantic features of the portals of the facades of Kyiv buildings of the late 19th and early 20th centuries, as well as in the detailed analysis of the compositional structure, constructive and stylistic components of the portals. A scientific novelty is the developed classification of the portals of the historical buildings of Kyiv. The research will contribute to the deepening of theoretical and practical knowledge about the peculiarities of Kyiv portals of the specified period, which can be used in the restoration and reconstruction of buildings of the late 19th - early 20th centuries. in Kyiv. The developed classification of portals will be a useful educational reference material for students - future architects and designers who are interested in the peculiarities of Kyiv's historical buildings.