Archaeologists in Italy have unearthed a Copper Age necropolis that contains nearly two dozen tombs and a collection of weapons.

The discovery was made in November at San Giorgio Bigarello, a municipality in northern Italy, during the construction of a community garden. However, researchers had no idea how extensive the 5,000-year-old burial site was until excavations earlier this year revealed 22 tombs containing human remains. Many of the burials included flint weapons, including daggers, “perfect arrowheads” and blades, according to a translated article in ArchaeoReporter, an archaeology-focused newspaper based in Italy.