Fact: The Roman Republic was established around 509 BCE after the overthrow of the last Roman king, Tarquin the Proud. Fun fact: Augustus (born Gaius Octavius) was Julius Caesar's adopted son. He cleverly maintained the illusion of the Republic while holding absolute power, calling himself "Princeps" (first citizen) rather than king or emperor. The Republic lasted about 482 years before transitioning to empire.

Fact: The Colosseum (completed 80 CE) had a complex hypogeum (underground structure) but early naumachiae were held there before the hypogeum was built. Fun fact: Emperor Titus inaugurated the Colosseum with 100 days of games, including a naumachia. Later, the hypogeum was added for gladiators and animals, making flooding impossible. The Colosseum could hold 50,000-80,000 spectators and used a retractable awning called the velarium for shade.

Fact: About 60 senators participated in the assassination, led by Brutus and Cassius. Fun fact: Caesar was stabbed 23 times, and the Senate floor was covered in blood. According to Shakespeare's play (not historical records), Caesar's last words were "Et tu, Brute?" (Even you, Brutus?). The Ides of March became a warning in Roman culture. Caesar's death led to civil war and eventually the rise of Augustus as emperor.

Fact: Roman concrete used volcanic ash (pozzolana), lime, and volcanic rock. Fun fact: Roman concrete is actually stronger than modern concrete when exposed to seawater because it contains minerals that continue to strengthen over time. The Pantheon still has the world's largest unreinforced concrete dome (142 feet diameter). Roman concrete allowed them to build massive structures like the Baths of Caracalla and the Colosseum.

Fact: Jupiter was equivalent to Greek Zeus, king of gods, ruler of sky and thunder. Fun fact: Neptune was the Roman equivalent of Poseidon (sea). The Romans adopted and adapted Greek gods: Jupiter (Zeus), Juno (Hera), Minerva (Athena), Mars (Ares), Venus (Aphrodite), Mercury (Hermes), Diana (Artemis), Vulcan (Hephaestus), Vesta (Hestia), and Ceres (Demeter). The Romans added their own gods like Janus (gates and doors) and Quirinus.

Fact: The Romans built about 50,000 miles (80,000 km) of paved roads and 250,000 miles (400,000 km) total including unpaved. Fun fact: The Milliarium Aureum was a bronze column erected by Augustus in 20 BCE marking the presumed center of Rome from which all distances were measured. Roman roads were built in layers (4-5 feet deep) with drainage ditches and curbs. They enabled rapid military movement, trade, and communication across the empire.

Fact: The last Western Roman emperor, Romulus Augustulus, was deposed by the Germanic king Odoacer in 476 CE. Fun fact: The Byzantine Empire, with its capital at Constantinople (originally Byzantium, now Istanbul), continued Roman traditions, laws, and military tactics. Emperor Justinian I (527-565) reconquered parts of the Western Empire including Italy and North Africa. The Byzantine Empire finally fell to the Ottoman Turks in 1453 CE.

Fact: The fiddle (violin) was not invented until the 11th century, so Nero could not have played one. Fun fact: The Roman historian Tacitus (born after the fire) reported that Nero was actually 35 miles away in Antium when the fire started. Nero did, however, use the fire as an excuse to build his grand palace, the Domus Aurea (Golden House), on the cleared land. Early Christians were scapegoated and executed for causing the fire.

Fact: Each consul had imperium (executive authority) and could veto (Latin for "I forbid") the other's acts. Fun fact: During emergencies, a dictator could be appointed for six months with absolute power. The consul system was admired by later political thinkers including the American founders. Famous consuls included Cicero, Julius Caesar (before becoming dictator), and Marcus Antonius (Mark Antony). Consuls commanded armies and presided over the Senate.

Fact: Garum was made by fermenting fish intestines and blood in salt for weeks or months. Fun fact: The best garum came from Spain and was so valuable that it was traded across the empire. Garum factories (cetariae) have been found in Pompeii, North Africa, and the Iberian Peninsula. The smell was so strong that garum production was banned from city centers. Modern equivalents include Southeast Asian fish sauce (nam pla or nuoc mam).