Daugavgrīva

Daugavgrīva (German: Dünamünde; Polish: Dynemunt; Russian: Усть-Двинск or Ust`-Dvinsk) is a neighbourhood in North West Riga, Latvia on the left bank of Daugava river. In this neighbourhood there is located Swedish built fortress on the Daugava River's left bank, commanding its mouth.

Fortress

On the opposite side of Daugava (German: Düna), outside the borders of the contemporary neighborhood, in 1208, there was built Dünaburg castle by the Teutonic Knights which initially served as a monastery. The Swedish fortress of Dünamünde, designed in a Dutch style by General Rothenburg in 1641, replaced the ruined Daugavgrīva Castle by 1680.

In 1695 the Commandant was captain Heinrich Nicolaus Rüdinger, forefather of future Patriarch Alexy II of Russia. Rüdinger was knighted by Charles XI of Sweden.Joachim Cronman later became the Commandant and he died on March 5, 1703.

After the fortress was seized by the Russians they reconstructed it. Regent Anna Leopoldovna of Russia, her husband Anthony Ulrich, and her son Ivan VI were incarcerated in Dünamünde in 1742.