Architects' correspondence role in the research of Kyiv cultural heritage objects

The article is dedicated to the insufficiently known problem of the Ukrainian architects' epistolary heritage which can be the important source for searching of the architectural memorials. The found and analyzed archives documents let show the exceptional and underestimated importance of the epistolary sources for Kyiv architectural history. They contain such facts and details that other sources don't have. These facts help interpret the known information from the new side