The Tower

This illustration shows a medieval tower, which is the landmark of the small town of Straubing in Germany, where I grew up. It's located in the center of the town square and you can see it from afar. It's 230 feet high and 700 years old and back in the days it was built to detect enemies, fires and ships approaching the city.

I wanted to play around with this style of illustration for some time and finally found a couple of hours over the weekend to work on it.

Since I'm fairly new to illustrations in general it would be great to get some feedback on this one.