House of the Dragon, a spinoff of Game of Thrones, has launched. Here are some surprising facts regarding how the prequel series was created.

It wasn't the initial concept for a Game of Thrones spin-off.

House of the Dragon is a prequel to Game of Thrones. Martin and Ryan Condal created the HBO prequel series partly based  on Fire & Blood.

Based on the real account of the English Civil War known as The Anarchy, is the film House of the Dragon.

Many Game of Thrones spin-off series are coming.

The wigs and costumes aren't easy work for the cast.

Heroes and villains aren't so clear-cut

There are 17 dragons!