La Sfera by Gregorio Dati

[R. Sale]

Always good to see some additional material. The cosmic representations at the start are all ideologically similar. They show the sun, moon, and a field of stars. In comparison with the VMs, there are a couple distinctive differences. The VMs has all those names / labels. The VMs has two <a pair of> charts. The f68r2 image appears to have the moon on top and the sun below.  Having the second image inverted is extraordinary, AFAIK

Regarding things inverted. The T-O in the VMs cosmos f68v3 is inverted. Regular T-O maps tend to be geographic. The VMs cosmos compares with examples from BNF Fr. 565 and Harley 334. The VMs cosmos has no concentric rings of elements, no concentric spheres for planets. The comparison is based on structure.

The mermaid comparison is flawed IMO. Mermaids are generic creatures, seen as either sea monsters or fish. They stay as mermaids and do not change into something else. They do not have thighs, which the VMs representation clearly does. There were also certain fresh-water "nymphs" where the most interesting option is mythical Melusine of Luxembourg, supposed ancestress of the Valois lines of the VMs C-14 era through their mother, Bonne of Luxembourg.