Llandovery Castle is a late thirteenth-century ruin which occupies a knoll overlooking the River Towy and the land surrounding it. The Normans built a castle in the current location in the early twelfth century and this was rebuilt in stone. It was burnt in the early sixteenth century and never repaired.
A Norman knight, Richard Fitz Pons, received the lordship of Cantref Bychan in 1116 and he probably began construction of a motte-and-bailey castle in same year. It was repeatedly lost to the Princes of Deheubarth over the next several generations. King Henry II of England spent a great deal of money repairing the castle in 1159–62, but the Welsh captured it regardless. It finally fell to the English under Edward I in 1277. It was briefly retaken by Welsh forces under Llywelyn ap Gruffudd five years later. The castle was then granted to John Giffard, 1st Baron Giffard, who likely rebuilt it in stone. The building passed to the baronial Audley family of Heleigh in 1299 (who later inherited the lordship of Cemaes in north Pembrokeshire) and then into the Touchet family in the fourteenth century. King Henry IV of England visited the castle in 1400 and it was besieged during the Owain Glyndŵr rebellion three years later. The castle was burnt in a rebellion led by Hywel ap Rhys in 1532 and was never rebuilt.
The keep is a large D-shaped tower on the western side of the castle. The gatehouse has two towers on the north side with a well-tower. There are also remnants of the curtain wall around the filled-in ditch.
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.