According to the contract of 1254 between Saare Lääne bishop Heinrich and the High Master of the Order Eberhard von Seyne the diocesan area of Hiiumaa was divided into two parts and Käina became the center of one of them. In the middle of the 13th century a new house of God was built in the newly established parish. The building´s incinerated ruins were discovered in 1981 while clearing the nave of the church.
A stone church was erected here in 1492-1515 during the reign of Saare-Lääne bishop Johannes III Orges. It is one of the youngest and quaintest medieval sacral buildings in the Western Archipelago, a simple gothic church with a single-aisle nave. Between the years 1859-1860 Käina church was thoroughly rebuilt. The southern wall of the nave was torn down and the nave was extended with a large new added structure in the southern side of the church. At first the church´s saint was Saint Nicholas, later however Saint Martin.
On October 14, 1941 the church was hit by an incendiary bomb which, dropping in through the ceiling of the choir burned the building to the ground.
Roman Walls of Lugo are an exceptional architectural, archaeological and constructive legacy of Roman engineering, dating from the 3rd and 4th centuries AD. The Walls are built of internal and external stone facings of slate with some granite, with a core filling of a conglomerate of slate slabs and worked stone pieces from Roman buildings, interlocked with lime mortar.
Their total length of 2117 m in the shape of an oblong rectangle occupies an area of 1.68 ha. Their height varies between 8 and 10 m, with a width of 4.2 m, reaching 7 m in some specific points. The walls still contain 85 external towers, 10 gates (five of which are original and five that were opened in modern times), four staircases and two ramps providing access to the walkway along the top of the walls, one of which is internal and the other external. Each tower contained access stairs leading from the intervallum to the wall walk of town wall, of which a total of 21 have been discovered to date.
The defences of Lugo are the most complete and best preserved example of Roman military architecture in the Western Roman Empire.
Despite the renovation work carried out, the walls conserve their original layout and the construction features associated with their defensive purpose, with walls, battlements, towers, fortifications, both modern and original gates and stairways, and a moat.
Since they were built, the walls have defined the layout and growth of the city, which was declared a Historical-Artistic Ensemble in 1973, forming a part of it and becoming an emblematic structure that can be freely accessed to walk along. The local inhabitants and visitors alike have used them as an area for enjoyment and as a part of urban life for centuries.
The fortifications were added to UNESCO"s World Heritage List in late 2000 and are a popular tourist attraction.