Russian fortresses are military structures built to protect territories and serve as strategic defense points. They often feature thick walls, towers, and moats, designed to withstand attacks. Many of these fortresses were constructed during the Tsardom of Russia and the Russian Empire to secure borders and control trade routes. Notable examples include the Kremlin in Moscow, which serves as a symbol of Russian power, and the Peter and Paul Fortress in Saint Petersburg, which was the first fortification in the city. These fortresses reflect the architectural styles and military needs of their respective eras.