Agrigento is a city on the southern coast of Sicily, Italy and capital of the province of Agrigento. Founded around 582 BC by Greek colonists from Gela, Agrigento, then known as Akragas, was one of the leading cities during the golden age of Ancient Greece. The city flourished under Theron's leadership in the 5th century BC, marked by ambitious publiā¦Agrigento is a city on the southern coast of Sicily, Italy and capital of the province of Agrigento. Founded around 582 BC by Greek colonists from Gela, Agrigento, then known as Akragas, was one of the leading cities during the golden age of Ancient Greece. The city flourished under Theron's leadership in the 5th century BC, marked by ambitious public works and the construction of renowned temples.