September 12 in #Russia: 1485 — The Tver boyars swore allegiance to Grand Duke Ivan III. The Tver principality became part of the #Moscow state. 1698 — The city of Taganrog was founded in the #Russian Tsardom. 1699 — For the first time, a Russian ship under a tricolor flag arrived abroad (in Constantinople). 1715 — Peter I issued a decree prohibiting the residents of the capital from reinforcing boots and shoes with nails and clamps.