What do you call this type of clouds?

I'm always fascinated by anything above. I love taking photos of anything that caught my eyes and this is one of them.

   Since I can't find a better angle I just made the tower the center of the photo, but I‘m actually rooting for these nice clouds! ^^

 I also include this crescent moon and I'm loving this angle! Do you know what kind of clouds is this? Coz' I'm already a fan!