Abstract: The subject of the study is the interest of specialists in the study and analysis of cultural heritage sites of St. Petersburg. The object of the study is an information resource on this topic - the city archives and electronic resources of St. Petersburg. The purpose of the study is to substantiate the need to optimize access to complete and reliable information on the cultural heritage of St. Petersburg. This information is disassembled from a variety of unrelated sources, which complicates the work of specialists in terms of quick access to complete information on the object. Analysis of the studies showed the relevance of the issue in obtaining materials on cultural heritage objects, but the method of optimal access to them has not been developed. On the basis of the considered problems, a hypothesis was built and an empirical study was carried out in the form of a survey of specialists in the sphere of preservation of cultural heritage objects of St. Petersburg. The results of the study made it possible to identify the problem of obtaining information and suggest a way to solve it. A proposal has been formulated to optimize the work of specialists, in terms of access to reliable and complete data on the cultural heritage of St. Petersburg. To do this, it is necessary to systematize archival sources and information systems for each object of cultural heritage into a single database. The authors have designated sections and headings of a single information source. The practical value of the study lies in the development of a proposal for the prompt receipt of information necessary for the design and other studies of cultural heritage sites in St. Petersburg. Its structure and approach to implementation are disclosed. A potential audience of specialists working in the field of conservation, use, promotion and state protection of cultural heritage sites of St. Petersburg is indicated. The results of the study can draw the attention of specialized specialists to the identified issues and become the basis for creating a system of archival materials for the preservation of historical objects of St. Petersburg.