15thc perception on swallowtail merlons?

[Koen G]

I've said so often in this thread that battlements were among the most common things to be changed/renovated on a building, so they should always be regarded with suspicion. If a building has swallowtail merlons now, it is absolutely not certain that it had those originally. This whole thread is full of people demonstrating that the merlons on buildings were pre-1450, so it can be done. But it requires some research. That is the added value of this collaborative project over a simple google search. If you would like to make an unresearched version of the map, that's fine by me, but I'm not interested in that.