Basically, it won't be better to be naked around historic architectures, considering that most of the countries around the world think that images of naked human are vulgar ones. Especially in Islamic nations, those kinds of images are strictly banned.
Though there are some countries where nudist beach is authorized, it will be punished to be naked in public in almost all of the countries.
So, when producing images of naked human, we have to be care about its back ground images.