Urbino is a gracious little town in the centre of Italy. It was heart of Italian Renaissance, it has a beautiful castle you must visit. I grew up there and I can assure that it’s a very peaceful city. Especially as a woman, I never felt threatened or ever had a problem walking by the streets by myself even in the middle of the night. People are not violent (even when they’re drunk) and there’s usually a lot of security around during the weekends (mainly to make sure that nobody gets too loud with the music). So I would totally feel comfortable in Urbino as a solo female traveller.