The collection of articles by Doctor of Historical Sciences, Professor Gennady Viktorovich Kretinin is dedicated to the 70th anniversary of the birth of the famous Russian historian. Articles are devoted to a wide range of issues that the hero of the day deals with - the history of the Southeast Baltic from the Middle Ages to the 21st century, the past of the German province of Prussia (East Prussia), the history of the Kaliningrad region of the Russian Federation, the history of both world wars, the recent history of Lithuania, source study and historiography, problems of historical memory.