Fagervik ironworks, one of the oldest in Finland, was founded in 1646. The ironworks consisted of two iron forges and one blast furnace. The remarkable rococo-style manor was built in 1773 by Johan Hisinger. It’s located near the "King’s Way", a road from Turku to Vyborg. Both Gustav III (the king of Sweden) and Alexander I (the tzar of Russia) have stood overnight in Fagervik. The large baroque-style park with the Chinese pavilion surrounds the manor. It was built by Mikael Hisinger in the end of the 18th century.
There’s also a privately owned church built in 1737 and several small labour’s houses near the ironworks. Fagervik is well-preserved and solid sample of the early industrial architecture in Finland. The Fagervik-Snappertuna area is defined as National Landscape Heritage.
The ironworks, manor and museum with café is open to the public in summertime. Also guided walking tours are available for visitors.
The Petersberg Citadel is one of the largest extant early-modern citadels in Europe and covers the whole north-western part of the Erfurt city centre. It was built after 1665 on Petersberg hill and was in military use until 1963. It dates from a time when Erfurt was ruled by the Electors of Mainz and is a unique example of the European style of fortress construction. Beneath the citadel is an underground maze of passageways that can be visited on guided tours organised by Erfurt Tourist Office.
The citadel was originally built on the site of a medieval Benedictine Monastery and the earliest parts of the complex date from the 12th century. Erfurt has also been ruled by Sweden, Prussia, Napoleon, the German Empire, the Nazis, and post-World War II Soviet occupying forces, and it was part of the German Democratic Republic (East Germany). All of these regimes used Petersberg Citadel and had an influence on its development. The baroque fortress was in military use until 1963. Since German reunification in 1990, the citadel has undergone significant restoration and it is now open to the public as a historic site.