This is the outdoor day market setup at Piazza del Mercato Centrale just outside multi-floor indoor food market and dining hall. It is fairly similar to what you will see at the Nuovo Mercato minus the overhead cover of being inside a loggia and the Wild Boar Statue.
You'll find quite a few sellers of leather products including bags, belts, purses, wallets, jackets and the likes. There are a few other non leather items on offer as well but mostly its an outdoor leather market scene. Picture taking is fine even if you have no intention of buying anything.