Let’s say that I forget to do " simple building" and was overwhelmed by all the work because I wanted to do somewhat recognizable model. Ironically on this angle there is no too many good photos to copy 
Anyway I am fairly satisfied on end result. ( I think I visit this work again when I learn pit more tho)
In my render there is window frames but in real castle there is submersion inside a wall. I liked to do frames using edit mode and not adding mesh like I did with my computer monitor model.