On September 15, 1590, a strong earthquake was recorded here.
After a strong earthquake in 1365, the spheres were missing.
Another strong earthquake hit the area in 1981 with less destructive effects.
Already, some elected officials have called for a new look at the building code, as they do after every strong earthquake in the region.
This was the second time in 23 years the area had been affected by a strong earthquake.
In 1905, it was the site of a strong earthquake.
Another strong earthquake struck the region on April 29, 1965.
But such strong earthquakes come only every 500 years or so, far less often than in California.
A stronger earthquake hit the area in April, killing two people.
However, the buildings were destroyed by a strong earthquake in 1863.