Might not be the best HDR ever - I hadn't any tripod, which is useful in HDR, but I am quite happy of:
1. The result
2. The luck I have to live in Rome :-)
B/W (this is the goal)
colored (source for post prod)
Canon 40D
Tamron 17-50mm f2.8 and variable timings
Handheld
Ps. it was darkening, hence the f2.8. It's not the perfect aperture for sharpness, but it gave me a fast enough +2 stops handheld.