In the northeast corner of the Archaeological Park there is a long street strewn with graves from the Greek, Roman and Byzantine periods, which were carved into the limestone cliffs here. Among them there is also the famous 'tomb of Archimedes', which can be recognized easily by its gabled façade. According to legend, the famous mathematician, who died during the Roman siege of Syracuse in 212 BC, is buried here. However, even the Roman writer Cicero noted that Archimedes was buried in front of the gate to Agrigento. The supposed grave of Archimedes is a Roman columbarium from the 1st Century A.D.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.