The stone of its quarries and its transformation has been one of the most important ways for the people of the town to earn their living .
Campaspero sits on a seam of stone 30 metres thick , which the townspeople have used since they settled there .
The stone of Campaspero 's quarries and its transformation has been one of the most important ways for the people of the town to earn their living .
Campaspero sits on a seam of stone 30 metres thick , which the townspeople have used since they settled there .