I interpret the one on the right here as a concave niche (similar to the one on the left) decorated with a shell.
The motif could come from classical nymphaei and was later adopted by Renaissance and Baroque art. Likely, classical examples could still be seen in Europe in the middle ages. It is possible that the motif also appears in De Balneis, but I didn't check.
The motif could come from classical nymphaei and was later adopted by Renaissance and Baroque art. Likely, classical examples could still be seen in Europe in the middle ages. It is possible that the motif also appears in De Balneis, but I didn't check.
![[+]](https://www.voynich.ninja/images/collapse_collapsed.png)