
Bologna-107
Bologna has been the home of the reference weights and measures used for trade and markets. We did not have time to check their accuracy.

Bologna-109
Translation: William Oberdan, sacrificed for Italy, in fearful warning and rebuke to the tyrants outside and the cowards within.

Bologna-110
The Basilica of San Petronio which contains an astronomical metric- a meridian line representing the annual movement of the earth around the sun.

Bologna-111
I saw that it was “off-axis” with the church, an odd feature, but it was used to track the sun’s position throughout the year by the light through an aperture at the top.

Bologna-112
It is marked with days of the year with tiles marking the signs of the zodiac along the way.