Thank you Pierre! 1985 FDC showing the Roman amphitheater in Carthage. This stamp was the domestic rate of 3 which comprised a 'UNESCO' set.
These are from a 6v set entitled, 'Safeguard Carthage', pushing for UNESCO protection which would come six years later. I don't know where in the site this ostrich mosaic panel is from, or if it a stylized re-imagining of one? An imperf s/s also exists. Issued: April 26 1973.
Postcard of the St-Cyprien Basilica.