I love this drama so much. I love the concept, idea, or whatever it's called. It's just like anime titled "Sword Art Online", players are playing AR games, if they die in the game so do they in real life. I enjoyed the story... at least until I watched episode 13.
This drama is controversial. You know, before you make a history-based story/script, you should learn the real history first. Then, when you put it to your story, you HAVE TO put that history-line to your story as it is. You should NOT falsely rewrite the history onto your script. If you don't know the truth or what the world know about that history, then DON'T write it. It makes controversy, makes many people mad, and people will unite to prosecute the actors, actress, director, writer, etc.
It's just same as this drama. On 13th episode, there are lines tell you about one of most believed religions in the world, Islam. I bet, the writer has not done the research about Fatima, Muhammad, Islam, and the history of Granada itself. Once again I tell you, reader. If it has to do with, race, religion, ethnic, history, and so on, you can not take it a joke. Don't even rewrite their history falsely. If you want to create novel, script, or anything that has to do with them, then you HAVE TO research it, do interview with scientist, professor, etc., and make sure yours is legit enough to be published. If you CAN'T, then just find another theme, genre, or whatever it's called. I feel sorry for Park Shin Hye who had to do the lines. I hope people/netizens out there don't blame her. It's the writer's fault.