The Pantheon
With its absolutely perfect proportions, the Pantheon was considered in antiquity as the "Miracle of Rome. Assessment remains valid until today, because this miracle stand proud, just as it was built by Adriano, after 1 900 years. This temple is an extraordinary example of one of the greatest inventions novels: the dome. With a diameter of 43.5 meters - the equivalent distance between shoes and torch the statue of Liberty - The Pantheon Dome remained until the 15th century the biggest building of its kind in the world.The construction is a perfect hemisphere, with equal height and diameter between them. A structure of this type was made at that time only because of other inventions Roman concrete. But how it was possible for the Romans to build a dome of such dimensions without front steel fittings? Using pumice mixed in concrete, builders of Rome have created an incredibly easy material and resistant. It was molded into a mold which is narrow, reaching a thickness of 6.7 m at the dome only 0.6 meters in the top.
Colosseum
Colosseum remains the most famous and largest arena ever built by the Romans. The initiative had its building an Emperor Nero as a major influence they had in those times of gladiators fighting. Thus was a huge arena for such public performances.The term comes from the Colosseum colossal statue - 36 feet - which represent the image of Nero in the sun god, once located near the amphitheater, subsequently demolished. Not only the statue but Amphitheater was a grandiose view. Ellipse-shaped, with large axis of 186 m, less than 150m axis, have a circumference of 520 m and a height of 55m, providing places for about 50,000 spectators. Foundation that was built was 12 feet thick.
Let builds something, it was even for Romanians unbeatable builders a real challenge. He called for - among many other construction materials - tens of thousands of tons of marble (brought from nearby, the Tivoli) and nearly 300 tons of iron to link blocks of each other. As a precedent in modern prefabricated materials, many parts of the Colloseum were built elsewhere and brought to the arena construction site for assembly. This method allowed an accelerated pace of work which led to the construction of the building in only 7 years.
Roman Catholic Cathedral
Built in the XIII-th century, 
is the most valuable monument of early medieval architecture in Transylvania, which harmoniously combines elements of the Gothic Romance.
The building was conceived as a basilica with three ships, transept with three semicircular apses, turn over and two square towers on the west side, later adding the two ships in that area .
The most important building from the early Renaissance in Transylvania is undoubtedly chapel "Lazo", located on the north side of the cathedral, inside it is a ribbed vault late Gothic, with key vault decorated with figures of Transylvanian .
Inside the cathedral is the sarcophagus of Iancu de Hunedoara, along with the brother Johannes Miles, son or greater Ladislau (located in the ship south side) and those of Queen Isabella and his son John Sigismund.