Onofrio's Great Fountain stands just inside the Pile Gate at the western end of the Stradun, a large domed polygon decorated with carved stone masks. It was built in 1444 as part of the water supply system that brought fresh water to Dubrovnik from the Šumet spring near Rijeka Dubrovačka, and it functioned as the main public water source for the old town for centuries.
The fountain still runs — the masks still pour water — and on hot summer days you will see locals and visitors drinking from them. It is a good place to fill a water bottle. The smaller Onofrio Fountain at the other end of the Stradun, in Luža Square, was built by the same engineer at the same time, but was damaged beyond full restoration in the 1667 earthquake.