It was built in the 1st century (probably 97 AD) by a rich family of ancient Ephesus, that of Offilius Proculus, who wanted to pay honors to Sextillius. Erecting buildings devoted to the Romans was common for the Ephesians in order to be in good relations with the Roman Empire.
The Polio fountain, as well as the other fountains of Ephesus city, was provided with water from Cayster river, Kencherios (Kusadasi) and from a stream of Marnas.
The Fountain of Polio was located opposite the Dominitian Temple. There was an arched façade and it was decorated with statues that can be seen in the Museum of Ephesus nowadays.