Rosario Gagliardi was born around 1690 in Syracuse to Onofrio and Maria Conti.
The family lived in Syracuse in a district called “degli Bottagherelli” until 1707, when their father moved to Noto for work. It was here that Gagliardi officially began to work as an architect.
This commitment and skills shown in the town’s reconstruction would make him one of the best architects in Sicily. He was called to Ragusa, Caltagirone, Syracuse and Niscemi, and was responsible for most of the religious buildings in the Val di Noto.