The 11th-century castle at Castelmezzano in southern Italy was built by what conquering group of people?

A Huns
B Visigoths
C Normans

The Normans—meaning northmen—expanded their control across a swath of Europe and beyond, including lower Italy. They settled in an existing village, shadowed by mountains, and built a castle that today sits in ruin.

The correct answer is Normans.