15thc perception on swallowtail merlons?

[Koen G]

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FIORE DI VIRTÙ -- FIOR DE VIRTU utelissimo acadauno fidel Christiano. Venice, Christophorus de Pensis de Mandello, April 29th 1500.
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The Flower of Virtue is an anthology of moralizing content drawn up in the early fourteenth century by a certain friar Tommaso, who lived between the late thirteenth and early fourteenth century. The collection, of which well over one hundred manuscripts are known, had a great success and was re-proposed in more than thirty editions of the fifteenth century and translated, even several times, into numerous languages. Reprint of the edition of April 24th 1500.