Daugavgrīva fortress

Daugavgrīva fortress - Credit: Wikimedia Commons

Daugavgrīva fortress (German: Dünamünder Schanze, Festung Dünamünde, Polish: twierdza Dynemunt, Russian: крепость Дюнамюнде, Усть-Двинск, Swedish: Neumünde) is a fortress built in the Swedish Livonia in the 17th century. It is located in Daugavgriva near the mouth of Buļļupe river branch in the Daugava. Read more on Wikipedia

type: military installation
date from: 1624

Source: en.wikipedia.org