15thc perception on swallowtail merlons?

[Pierre Dumont Himself]

I'm gonna start doing so if you have no objections.
I expect hundreds of new frescoes to show up. This is what my draft map of the Piemonte looks like: 

All the purple dots are church frescoes up to 1500, most of which depict Guelph merlons. Among them, there are dozens and dozens of examples in bumfuck nowhere, all painted by the great masters of the time (roadside chaples, moountain churches, frescoes in tiny hamlets).
 That's just one region, and not a particularly prosperous one.