The historical core of the city of Trogir, located on a small island between the coast and the island of Čiovo, although extremely small in proportions and not as populated today as before, is rich in monuments from the Romanesque to Baroque periods. During the Renaissance, after the terrible destruction of the Venetians, the city itself was rebuilt. Although the Venetians rebuilt the cathedral and the Communal Palace, for the renovations of the palaces their owners were in charge. Thus, from the period of the 15th century, we have evidence of the renovations of several palaces and houses, among which are: the Great and Small Ćipiko palaces, the Lucić palace, the Berislavić house and the Barbieri palace. All the mentioned palaces and house are renovations of earlier Romanesque houses. Andrija Aleši, Nikola Florentinac and Ivan Duknović participated in the renovations of those palaces. In the first part of the final paper, the historical context in which the renovation of the city palaces takes place is dealt with. In the second part of the paper, the author analyzes the partitions made on the five mentioned palaces and houses. For each palace and house, the city institutions that operate in them today are listed, such as the City Library of Trogir, the Conservation Department of the City of Trogir, the School of Foreign Languages Katedra. Unfortunately, some of the mentioned palaces and houses are endangered due to the process of tourism in the city. The goal of this final paper is to emphasize the importance of Trogir palaces and houses from the 15th century and their preservation as an important part of Trogir's cultural and artistic heritage.