The Romans constructed the Colosseum of a primitive form of concrete. They made concrete using lime, which they burned to create quicklime, water and volcanic ash. The volcanic ash served as the aggregate and is likely the reason Roman concrete, which was 10 times weaker than the concrete used in 2014, remains after almost 2,000 years.Know More
By the time the Colosseum was constructed, the Romans had over two centuries of experimenting with concrete. Their early structures used volcanic ash from a variety of sources, but they eventually came to prefer ash from a single source, the Pozzolane Rosse deposit. This deposit is from a 456,000-year-old volcanic flow located a few miles southwest of Rome. Likely Emperor Augustus helped to standardize the concrete mix used to ensure durability.
The Romans learned to use a different aggregate, Pulvis Puteolanus, when they were doing construction in harbors. The salt in seawater erodes modern concrete. It is also damaging to concrete mixed using the aggregate found in the Colosseum. However, the Romans discovered that changing the aggregate source improved the material's resistance to the erosion. The durability of such concrete causes the Romans to ship tons of the aggregate to cities located along the Mediterranean for use in building lasting concrete structures.Learn more about Ancient Rome
The Parthenon of Ancient Athens was made of hand-carved pentelic marble from top to bottom, with some timber to support the slanted marble tiles of the roof. The segments of the columns were internally secured by iron clamps with a layer of molten lead. The statue of Athena Parthenos inside the Parthenon had ivory skin and nearly 2,400 pounds of gold armor, weapons and jewelry.Full Answer >
The infamous Roman Colosseum was an amphitheater built for the entertainment of Roman citizens, commissioned by Emperor Vespasian. While construction began approximately in 70 to 72 A.D., it was not finished until 80 A.D.Full Answer >
The number of people who died in the Roman Colosseum was about 400,000. Also, about 1 million animals died in the Colosseum.Full Answer >
The Roman Empire evolved over many centuries, but tradition holds that the city of Rome itself was founded in 753 B.C. As a city that is still standing today, Rome has never been completely finished.Full Answer >