> - almost all swallow tail castles (with two exceptions) have square towers, > not round ones, > - none (none!) of the castles with swallow tail towers also has "lightning > conductor" style towers.
Except for the Kremlin in Moscow - as I pointed out earlier and it seems to have gone unnoticed. It was built by Italian architects in the 15th c., has round towers with lightning conductors, etc. So why should it be excluded? Besides, I have always felt there is something vaguely Byzantine/Russian about the VMS ornaments.
Here is a nice site about the Kremlin with a number of photographs, showing the towers and dove/swallow-tail battlements:
http://www.stanford.edu/dept/CREES/kremlin/fortress.html