Built around the 2nd century AD, the Albenga amphitheater is still the only building of this kind known in the Riviera di Ponente.
According to the portions of the wall that re-emerged in the excavations of 1973/75, it is believed that it had an elliptical plan of about 72.80 meters for 52.20 and that it could contain a few thousand spectators.Probably used only for gladiatorial shows, in history it was the scene of the most diversified events: it was used as a burial place in the Middle Ages and saw two small bunkers used by German troops to control the war in the middle of its arena.References:
First record of Kastelholma (or Kastelholm) castle is from the year 1388 in the contract of Queen Margaret I of Denmark, where a large portion of the inheritance of Bo Jonsson Grip was given to the queen. The heyday of the castle was in the 15th and 16th centuries when it was administrated by Danish and Swedish kings and stewards of the realms. Kastelhoma was expanded and enhanced several times.
In the end of 16th century castle was owned by the previous queen Catherine Jagellon (Stenbock), an enemy of the King of Sweden Eric XIV. King Eric conquered Kastelholma in 1599 and all defending officers were taken to Turku and executed. The castle was damaged under the siege and it took 30 years to renovate it.
In 1634 Åland was joined with the County of Åbo and Björneborg and Kastelholma lost its administrative status.