Last July excavations for the new Sant'Anna hospital in San Fermo della Battaglia, near Como (Italy), revealed a double concentric circle of ancient stones. Thought to date back to 3000 BCE, the site is a "highly articulated prehistoric structure that could be either an ancient astronomical observatory or a sacred space," according to Stefania Iorio, Archaeological Superintendent of the region. The diameter of the two circles is about 70 metres, and they are crossed by a sort of pathway, paved with stones.