The old bridge has arches of different sizes, but none have suffered any recent collapse, apart from a partial one in the 1960's. They've been around for approx. 450yrs so are pretty solid.
Apparently, an arch made of stone doesn't need any mortar, and on that nerdy note, I'll finish.
(The extra is dusk over the river, and a sharp shower which caught my camera out. Apologies for rain on lens. Up until then, it had been feeling quite smug having survived the day without getting wet.)
Many thanks to the rock solid BobsBlips for hosting.
Thanks also to hobbs (moody mono) and skeena (Film Noir.)