The dictionary for the first time includes information about the names of all Moscow streets - both existing and disappeared during development and reconstruction. Many errors and omissions of previously published reference books have been corrected, the time of appearance has been clarified and a new explanation has been proposed for the origin of a number of toponyms, such as Red Square. Tabletops, Bolvanovka. Luzhniki et al. The dictionary also includes the names of all the villages that existed on the territory of Moscow, clarified information about the time of their first mention.