Daniel and the clocktower

It was a random idea to make a portrait. This is one of my friends, he is a real fan of the movie Back to the Future so when I was working on this piece, suddenly appeared the idea to put the clocktower behind so a little later I made a little research and I draw it. I showed the work to my friend and he thought that was a tracing picture but it really doesn't it. I did it by hand looking the picture in my palm top.