Today’s Snowdonia Mountains and Coast has evolved from a rich tapestry of history, culture and landscape that dates back to prehistoric, pagan times followed by the Roman occupation, the rise of Christianity, the age of the Mediaeval Princes, the Viking, Anglo Saxon and Norman invasions through to the industrial revolution and modern times.
The area is peppered with hundreds of prehistoric sites, and one of the most important and famous is Tre’r Ceiri (Town of Giants), a significant Iron Age settlement that dominates the Llŷn Peninsula on the slopes of Yr Eifl, 400 feet above the Irish Sea. The settlement contains considerable remains including 150 stone huts and a huge rampart, which were built 200 BC. Many of the remaining walls are still over 4 metres high in places.
With the collapse of the Roman Empire and the departure of the Roman legions, other invaders, despite the difficult mountainous terrain of the area, eventually succeeded in occupying the land. The Vikings, Anglo Saxons and Normans came and left their mark on the area. This fuelled a period that saw the Princes of Gwynedd build numerous castle strongholds in an endeavour to protect their lands from the invaders and each other!
The castles of Dolbadarn and Dolwyddelan were built in strategic positions within the heartland of Snowdonia to control the two principal routes through the mountains.Criccieth Castle is another fine example that sits on the headland overlooking Tremadog Bay and towers above the town of Criccieth. This castle was also built by Llywelyn the Great and expanded by Llywelyn the Last. Castell y Bere, another native Welsh castle situated north of Abergynolwyn, is also likely to have been built by Llywelyn the Great around 1221.
The native Celtic society of the tribes that populated the area's Iron Age settlements changed completely with the coming of the Romans. But despite the might and sophistication of the Roman armies they found the Celts and Snowdonia's terrain a formidable opposition. They eventually succeeded in overcoming the indigenous population and occupied many of the hill forts and also built their own encampments in the region. Gnaeus Julius Agricola established the first wooden and earth fort in Caernarfon in AD77 - the remains of the Segontium site is still visible today.
With the advent of Christianity many ancient monasteries, abbeys and churches were established in the area. The origins of Bangor Cathedral in the university town of the region can be traced back to Celtic times. St Deiniol founded a monastery here in the 6th century - around c.525 - on land given by the king of Gwynedd, Maelgwn Gwynedd.
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