I start a "did you know" section :-)
Did you know... ... that an old Roman and Romanesque site is both registered as French Monument Historique and Spanish-Catalan Bien Cultural?
I had to double check it. It is located right on the border. As a result, we have two identifiers here: https://commons.wikimedia.org/wiki/Category:Archaeological_site_of_Panissars
Vicenç