Museums. Lots of museums. In this case, a triple header.
The stone plate on the front wall announces the "Museo Criminale Medioevale"; the Medieval Criminal Museum.
On the first column we see "Museo Leonardo Macchine Da Guerra"; the Leonardo Museum of Machines of War.
I hadn't noticed that another tourist had stepped into the right of my frame as I shot, but yeah, that's the Museo Della Tortura"; yes, a museum of torture. One of several that we encountered in Italia. Unfortunately we didn't make it into any of them.
Ah, my kinda town.
Of course the suit of armour belongs to the second of these. I don't know how The Hound wears one of these things around. I would prefer to follow the style of Bronn; fight light, fight dirty.