The old style architecture in Rome inspires me a lot.
When I saw a photograph my father (@mandibil) took 15 years ago of Ponte Fabricio, an old bridge still standing from the antique Rome, I just had to draw it :-)
This is the photo that inspired me:
I took some photos while I worked on the drawing:
I started by adding the most important lines in the drawing
Here I have added some shadows and more details
Here I have started adding the stones near the river. It took me a long time to finish all the stones in the drawing
This is the finished result :-)
Ponte Fabricio on Wikipedia
https://it.wikipedia.org/wiki/Ponte_Fabricio