Kirkkosaari ("The Church Island", also known as Köyliönsaari) is one of the oldest places of residence in Satakunta area. Two Iron Age cemeteries are located at the north side of Kirkkosaari.
According the legend Lalli, the pagan chief of Kirkkosaari manor, killed bishop Henry on the ice of lake Köyliönjärvi on January 20, 1156. Although Henry has never been officially canonized, he has been referred to as a saint since as early as 1296 according to a papal document of the time. After this the manor and island was moved as the property of Turku bishop. Since 1746 the manor has been owned by Cedercreutz family and is still in private use. Present buildings are from the 18th and 19th centuries.
The church of Köyliö has been in Kirkkosaari since the Middle Ages. The present wooden church was built in 1752 to the old cemetery site. There are also some remains of the medieval chapel in Kirkkosaari manor garden.
The settlement of Trepucó is one of the largest on Menorca, covering an area of around 49,240 square metres. Today, only a small part of the site can still be seen, the two oldest buildings, the talaiots (1000-700 BCE). Other remains include parts of the wall, two square towers on the west wall, the taula enclosure and traces of dwellings from the post-Talayotic period (650-123 BCE).The taula enclosure is one of the biggest on the island, despite having been subjected to what, by today’s standards, would be considered clumsy restoration work. This is one of the sites excavated around 1930 by Margaret Murray, a British archaeologist who was a pioneer of scientific research on Prehistoric Menorca.
The houses are perfectly visible on the west side of the settlement, due to excavation work carried out several years ago. They are multi-lobed with a central patio area and several rooms arranged around the outside. Looking at the settlement, it is easy to see that there was a clear division between the communal area (between the large talaiot and the taula) and the domestic area.The houses near the smaller talaiot seem to have been abandoned at short notice, meaning that the archaeological dig uncovered exceptionally well-preserved domestic implements, now on display in the Museum of Menorca.The larger talayot and the taula stand at the centre of a star-shaped fortification built during the 18th century.