15thc perception on swallowtail merlons?

[Pierre Dumont Himself]

A few more: 
Castello di Drugollo
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Castello Scagliero
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Castello Scaligero di Malcesine
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Burg Hocheppan
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Surviving gates of Riva del Garda
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Palazzo della Ragione
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On late medieval castle drawings:
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More castles here, with some paintings and attempted datings of swallowtail merlons:
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A nice drawing of Arco Castle by Dürer, confirming the merlons
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I would also like to note that the Rocca di Vignola also has incorporated merlons, not just frescoes. [size=1]Rocca di Vignola[/size]
A few more examples of these roofed castles:
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Soncino, Monticelli d’Ongina, Pandino, Spilamberto, etc.