
Bastion Ungern is an 18th-century stone fortification located in central Loviisa, representing part of the town's planned fortress system that was never fully realized. Construction began in 1748 under the leadership of Augustin Ehrensvärd, the same renowned Swedish military engineer who designed Suomenlinna fortress near Helsinki. The bastion was named after General von Ungern, and forms a pair with the Rosen Bastion positioned on opposite sides of the King's Road through the town. Though the original fortification plan envisioned surrounding the entire city, only the Rosen and Ungern bastions with their associated earthworks were substantially completed. Today Bastion Ungern remains in better condition than its counterpart, freely accessible year-round to visitors interested in Loviisa's military history and 18th-century fortification architecture.