Why did Edward IV think he was (rightful) King of Castile?

There’s no doubt he did. Just see this link. The Edward IV Roll shows Edward mounted on a horse which is barded with a heraldic display. As you will see, Edward gives just as much prominence to the arms of Castile and Leon as he does to those of England and France. This is, very… Continue reading Why did Edward IV think he was (rightful) King of Castile?