15thc perception on swallowtail merlons?

[Pierre Dumont Himself]

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I've also stumbled upon this article, which makes three interesting claims:
1. That the merlons of the Prato Castle are probably original
2. That the merlons on the the Churburg Castle tower date back to the 13th century
3. That to the author's knowledge, no one had yet presented an overview of swallowtail merlons when the article was published (2019)

EDIT: found Codex with seventeenth century drawings of castles in Tirol

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