A previously unknown building has been identified by archaeologists working in Sicily’s Valley of the Temples in Agrigento, Italy, according to a new study published in the Journal of Archaeological Science: Reports. The structure may have been part of religious practices in the ancient city.

Originally founded as a Greek colony known as Akragas around 580 BCE, the Valley of the Temples is today one of the region’s most treasured ruins, and a UNESCO World Heritage site since 1997. Though it was destroyed by the Carthaginians in 406 BCE, it later prospered under Roman rule.