Dalheim Ricciacum is the site of a well-preserved Gallo-Roman theatre dating from the 2nd century AD. The site was first excavated by the Société Archéologique around 1850 under Antoine Namur (1812–1828). Thousands of objects were discovered, registered and described in three reports.
It appears that the settlement grew considerably until by the 3rd century it covered an area of about 25 hectares. In addition to the theatre there were private houses and large public buildings including a hostel, several temples and baths. There were also two large cemeteries. The findings indicate the population consisted of artisans and merchants. One of the more important finds was a magnificent temple measuring 28 by 19 metres. It dates from Emperor Hadrian's reign, about 130 AD.
The eagle monument commemorates the old Roman town Ricciacum and is also the symbol of Dalheim. The huge stone blocks forming the solid base of the monument were excavated in the 19th century, not far from their present location. The blocks no doubt date back to Roman times (middle of the 3rd century). They may have been removed from the Roman theatre in order to serve as the foundations of a burgus or defensive watchtower. The monument itself was built by the Archaeological Society of Luxembourg. On 28 May 1855, the groundbreaking ceremony was held in the presence of William III of the Netherlands who was also Grand Duke of Luxembourg. The memorial commemorates the presence of the Romans on Dalheim's Petzel plateau. Standing on a globe, the eagle seems to be looking in the direction of Trier while its body is facing Metz, symbolizing the old road from Metz to Trier.
References:Towering 52 meters above the sea, Bengtskär lighthouse is the tallest one in Scandinavia. The building started in in 1905 after the shipwreck of S/S Helsingfors and was completed in 1906. The lighthouse was designed by architect Florentin Granholm. On December a special petrol lantern, designed and built in Paris, was brought to Bengtskär and installed atop the tower.
German fleet bombarded Bengstkär in the First World War in 1914. Since the Gulf of Finland was heavily mined, it was not until 1919 that the surrounding seas were declared safe for shipping, that the light was lit again.
After the war the military value of Bengtskär increased as part of the defence system of independent Finland. In Second World War (1941) Soviet Union made a suprise attack to island. After a bloody battle, the small Finnish garrison emerged victorious. Intermittent repairs to the facility continued during the post-war period.