15thc perception on swallowtail merlons?

[MarcoP]

Bourtzi fortress, Karystos, Euboea, Greece (ca. 1350)
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As far as I can tell, this is reliable. These fortifications were built by the Venetian Republic, possibly a little later than 1350.

This part of the fortress clearly has never been restored and a single merlon still stands at the right of the octagonal tower:
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I think that the better-preserved buildings also are in their original state:
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Since Venice controlled so many Greek islands, I guess that we will find many similar buildings there.

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Interesting, this would be the earliest clearly dated example.

What's up with this "Ghibelline corridor" here? It must have something to do with the position of the castles in the mountains.

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Basically, the main route between Italy and Northern Europe.