So we gathered the students today in front of this:
And we quickly got them doing quick drawings in their sketch-journals:
Huddling against the steps of a bank on one edge of the Piazza del Duomo didn't prevent our group from getting lots of attention. It was also 90f today, though thankfully there was a cooling breeze in the afternoon. It looks like a good group of students, who were so absorbed by their surroundings and drawing that they didn't get distracted at all.