Although I realy should congratulate you on remaking the tower of Barad-Dûr. (Sauron must be realy happy with you )

Its indeed just something taken from something we all know too well. A tower doesn't only get its darkness from its looks. Its also the story around the tower that makes it evil. Just build a tower. Make it look as awsome as you can. And then start making it evil.

 

(I can make a silver, white spire and let it reach for the brightest light. But how will you look at it when the devil lives inside?)