Over a century after Julius Caesar first invaded Britain, the Romans finally arrived in North Wales. Their main objective was Ynys Mn (the island of Anglesey), then home of the Druids, teachers and spiritual leaders of the Celtic tribes of Britain and beyond. 77AD saw North West Wales finally conquered, and a fort (Segontium) was established in what is now Caernarfon and became the western frontier of the Roman Empire for over 300 years. The gem of Caernarfon has to be its impressive castle built by Edward I, whose first son was born there, and led to the British monarch’s first son being given the title ‘Prince of Wales’.