Taavetti Fortress is a Russian bastion fort located at a strategically important road junction in Luumäki in southeastern Finland, built in two phases between 1773 and 1796 to defend Saint Petersburg following the Russo-Swedish War. Constructed at the command of Catherine the Great, the fortress was named after Saint David of Thessaloniki and features distinctive ramparts measuring approximately 650 by 800 meters in an almost circular configuration. The fortress saw minimal military action and was deactivated in 1803, yet the ruins were preserved and restored during the 1980s. Today, Taavetti Fortress is recognized by the Finnish Heritage Agency as a Built Cultural Site of National Interest and serves as a public open-air venue hosting events and recreational activities throughout the year.