This article consists of two different parts – theoretical and practical one. Theoretical part implies several problems regarding the application of Internet and digitization during the historical research: their significance and positive sides, various problems a historian encounters during the course of such application, their prospects in the future, etc. On the other hand, practical part of this lecture comprises the review of a number of various Internet sites significant for medieval history as well as those important for the history of the period extending from the French revolution until the First World War. Information about the contents are also given along with the addresses of these sites.