This is an amazing UNESCO cover from Jordan, depicting a complet set and a miniature sheet on topic "Art Treasures in Petra".
Inhabited
since prehistoric times, this Nabataean caravan-city, situated between the Red
Sea and the Dead Sea, was an important crossroads between Arabia, Egypt and
Syria-Phoenicia. Petra is half-built, half-carved into the rock, and is
surrounded by mountains riddled with passages and gorges. It is one of the
world's most famous archaeological sites, where ancient Eastern traditions
blend with Hellenistic architecture.
Petra is inscribed as Unesco's World Heritage site since 1985 and considered as one the most astonished cultural places in the world.