Swallowtail merlons... or provenance

[davidjackson]

Not exactly swallow-tail, but very similar. They are very late 15th century additions to the Alcazaba de Almería, the thousand year old Moorish fortress. Note the Christian bell in the middle; all were rebuilt by the Spanish after they conquered it in 1489.
   
Here you can see the two types of merlin on the walls - the double units built by the Spanish, and at the end, the original single units that were built by the Moors.
   
Sadly, a lot of them were rebuilt in a botched restoration in the 1960's, so there aren't any original Moorish ones left.