
So why do many fantasy writers like the thought of their tale being set in the Dark Ages? What makes it so appealing?

There are very few historical records from back then, therefore historians know little about it compared to what we know about more recent monarchs such as Henry VIII and Elizabeth I. Because of this, the era has been dubbed 'the dark ages'.

However, the era does hold one story that has gripped the entire world for centuries; that of King Arthur and the Knights of the Round Table. To this day they have found no evidence to prove that he ever existed, and yet no evidence to say that he didn't either. His story about Camelot, Guenevere, Sir Lancelot and, of course, Merlin, the Sword in the Stone, and the Lady of the Lake, is filled to the brim with mystery, magic, bravery and all things fantastical. Maybe he did rule a fine kingdom with his Knights, or maybe this was the very first fantasy story dreamed up. When comparing it to historical facts, Merlin the Sorcerer definitely sounds like a character from a work of fiction. But people love it and have continued to share the tale throughout generations. And, of course, it was set in a time when people didn't inherit the throne, rather they gained it through other means and deeds.
Maybe, with the story of King Arthur so deeply embedded in our minds, the fantasy genre grew and evolved from here; that the dark ages, because so little is known about it, was a haven for all things mystical and unexplained; that there could have been dragons roaming and sorcerers casting evil spells; that anything was possible. And maybe writers subconsciously want to create a fantasy story so big and fantastical that it will be remembered for thousands of years in the future.
You can't deny it, and as stereotypical as it is, the Dark Ages and Fantasy fit so well together...