The monastery has been standing here, among the northern landscapes of the White Sea, since the 15th century, and the history of the construction of the Solovetsky Kremlin is a mystery to this day. The weight of some boulders from which the walls are laid out exceeds 8 tons, and the age of the lichen growing on them is 2000–3000 years! When, by whom and how construction was started, even historians do not know. Another one and a half kilometers of tunnels pass under the monastery: the monks used them both as a sewer and as a back door. The Solovetsky Monastery is a real fortress, impregnable and fortified. During the Crimean War, the English fleet tried to bombard the monastery with cannons. The result of nine hours of incessant fire was only a lined seagull and a damaged icon.