Fiction

So I am somewhat writing a book and I have been starting to get a little curious as to how fantasy books have changed or stayed the same over the years. I have looked at a lot of websites but they haven’t really answered my question and I would really like someones input on this.
Thank you so much to anyone who answers! =)

Fantasy books in the past tended to take place in an idealized medieval land (castles, fair maidens, dragons, knights in shining armor, etc.), Greco-Roman mythology settings, or "barbarian" heroes saving damsels from either classic mythological or wholly author-invented creatures. Though you still see a lot of this, today’s fantasy is just as likely to take place in modern urban settings (that’s actually a major sub-genre), involve novel interpretations of classically "understood" creatures, or even futuristic (or not-so-futuristic, like, say, a steampunk King Arthur) fusions of science and sorcery.