The olive tree exhibit in front of the Duomo. Florence Culture & Heritage Week takes place in November every 2 years. For 10 days, there are exhibitions, food festivals, speakers & events throughout the city. Most are free to attend.
I'm always fascinated by how people dress when they travel. Which is not how we dress at home. We have our travel outfits, clothes that announce before you can even open your mouth that you're not from these parts. Which is perfectly fine. What is not okay, though---evidenced by this couple which I spotted in Florence recently---is that "travel clothes" are just not very cool looking.