The monograph covers the history of Lviv from the time of its foundation in the middle of the XIII century. to the present day. The struggle of the population of the city - one of the important strongholds of Ancient Russia - against the expansion of foreign feudal lords and the Vatican, social movements of the era of feudalism and capitalism, economic, political and cultural ties with Ukraine and Russia, the influence of the Great October Revolution on the rise of the revolutionary struggle of workers for social and national liberation and reunification with the Ukrainian SSR.