Mokhovaya Tower of the Sumsky Ostrog on the White Sea, preserved thanks to Pyotr Baranovsky
The Moss Tower of the Sumsky Ostrog is one of the few surviving wooden defensive structures of the 16th century in Europe. The Sumsky Ostrog on the White Sea consisted of six hexagonal towers and protected the lands of the Solovetsky Monastery from the Swedes. The Moss Tower is 19 metres high and 9.5 metres wide inside. The walls are 6 metres high. Such dimensions are characteristic of all ostrogs of the 15th to 17th centuries, in both Northern and Southern Rus'. The lower tier served as a refuge for local residents and as a warm undercroft; the upper one housed the garrison, and higher still were the guardrooms. The structure survives thanks to the outstanding restorer Pyotr Baranovsky; its present appearance is a reconstruction assembled in the 2000s, and by 1931 the tower looked as it does in the last photograph






