Book "House of the Romanovs. Genealogical Directory" is a genealogical publication containing information about the members and descendants of the Russian Imperial House in the period XIX-XXI centuries. To better navigate in the directory, the branches of the genus are divided by generation. The publication has a strictly genealogical principle of construction and is a generational painting of the descendants of Emperor Nicholas I along four male lines (Alexandrovich, Konstantinovich, Nikolaevich and Mikhailovich).