We have a zero-tolerance policy against illegal pornography.
Some of them were turned into museums, such as the cruiser Aurora which became a symbol of the October Revolution it was the Aurora that fired the salvo which signalled the storming of the Winter Palace - and is the oldest ship in the Russian Navy.
During World War II Leningrad was besieged by German forces from September 1941 to January 1944, a total of 872 days.
Defence Minister Margus Tsahkna said Estonia and other Nato governments had intelligence suggesting Moscow may leave Russian soldiers in Belarus once the so-called Zapad 2017 exercises are over, also pointing to public data of Russian railway traffic to Belarus.
Tsahkna cited plans to send 4,000 railway carriages to Belarus to transport Russian troops and gear there, possibly to set up a military outpost in its closest ally.
Estonia's defence minister has said that Russia may use large-scale military exercises to move thousands of troops permanently into Belarus later this year in a warning to Nato.