Close-up of an ornate ancient Roman door knocker. The photo was taken in Sallustiano, the 17th rione (region) of Rome, named after the ancient Gardens of Sallust. (Horti Sallustiano)
Door knockers such as this one used to be a symbol of wealth and power.
With all its beauty, intrigue and history, it's no surprise that the city is one of the most beloved tourist destinations in the world.
