The first two look like they have Voynich characters x and l. All the others except one look like "o".
The archways are not uncommon. Decorative elements like these were added to some of the medieval thermal spas, but I'm not sure what the "o" shapes might be. I would interpret them possibly as pipes except that the first two look like VMS letters.
The archways are not uncommon. Decorative elements like these were added to some of the medieval thermal spas, but I'm not sure what the "o" shapes might be. I would interpret them possibly as pipes except that the first two look like VMS letters.

