SAN MARINO

A nice cover from San Marino, one of the smallest countries in the world. The cover depicts 2 stamps issued in 1985 with 2 pictures of the Colosseum of Rome, Italy. The stamp on the top shows a picture with the whole monument in 85 d.C. and the stamp on he bottom the monument in the modern era. The city of Rome was the centre of the Roman Empire, and later, of the Christian world. It is home to a large number of major monuments of antiquity, including the Colosseum (pictured), the Pantheon, and the Roman Forum, as well as buildings from the Renaissance and Baroque periods. Originally listed by UNESCO as the "Historic Centre of Rome" in 1980, the site was expanded in 1990 and renamed to the current name Historic Centre of Rome, the Properties of the Holy See in that City Enjoying Extraterritorial Rights and San Paolo Fuori le Mura

SPAIN

A nice UNESCO cover from Spain with a single stamp issued in 2021 celebrating the Colosseum of Rome (Italy). Rome, center of the Roman Empire and later, from the 4th century, of the Christian world is home to a large number of major monuments of antiquity, including of course the Colosseum. The Colosseum is an oval amphitheatre in the centre of the city of Rome, just east of the Roman Forum and is the largest ancient amphitheatre ever built, and is still the largest standing amphitheater in the world today, despite its age. Construction began under the emperor Vespasian (r. 69–79 AD) in 72 and was completed in AD 80 under his successor and heir, Titus (r. 79–81).

POLAND

A nice cover from Poland, depicting 3 nice stamps on topic "Capital cities of the European Union". The three capitals are Rome (Italy), Valletta (Malta) and Berlin (Germany).
The historic centre (Old Town) of Rome and Valletta are also inscribed as Unesco World Heritage place since 1997.
Founded, according to legend, by Romulus and Remus in 753 b.C., Rome was first the centre of the Roman Republic, then of the Roman Empire, and it became the capital of the Christian World in the 4th century.
The capital of Malta was ruled successively by the Phoenicians, Greeks, Carthaginians, Romans, Byzantines, Arabs and the Order of the Knights of St. John's. Valletta's 320 monuments, all within an area of 55 há, make it one of the most concentrated historic áreas in the world.