15thc perception on swallowtail merlons?

[Koen G]

The Kremlin wall dates from 1485-1495, so its current form is 100% irrelevant for VM research: it didn't exist yet. From the wiki:

By the end of the 15th century, however, it was clear that the old constructions had long passed their time and Czar Ivan the Great's visions. Between 1485 and 1495 a whole brigade of Italian architects took part in the erection of a new defence perimeter including Antonio Fryazin (Antonio Gilardi), Marko Fryazin (Marco Ruffo), Pyotr Fryazin (Pietro Antonio Solari) and Alexei Fryazin the Old (Aloisio da Milano).[7] (The term Fryazin was used to refer to all people of Italian origin at this time). The new walls were erected by building on top of the older walls (some white stone can still be seen at the base in some places).

This is why the 1450 cutoff is so important.