Constantius of Aquino was a 6th-century bishop serving the diocese of Aquino in Italy. During his leadership, the region faced significant hardships, including the invasion of the Lombards and a devastating plague. He is particularly recognized for his prophetic abilities, which were noted by historical figures such as Gregory the Great. His life and ministry coincided with the era of Saint Benedict of Nursia, with whom he reportedly collaborated to address spiritual challenges within his territory.