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Mount Vesuvius on the feast of Vulcan. August 23, 79 AD.

The eruption of Mount Vesuvius in AD 79 destroyed the Roman cities of Pompeii, Herculaneum, Oplontis and Stabiae, as well as several other settlements. The eruption ejected a cloud of stones, ashes and volcanic gases to a height of 33 km (21 mi), erupting molten rock and pulverized pumice and ultimately releasing 100,000 times the thermal energy released by the Hiroshima-Nagasaki bombings. More than 1,000 people died in the eruption, but exact numbers are unknown. The only surviving eyewitness account of the event consists of two letters by Pliny the Younger to the historian Tacitus. On August 23, Mount Vesuvius begins stirring, on the feast day of Vulcan, the Roman god of fire. The Vulcanalia was the annual festival held August 23 in his honor. His Greek counterpart is Hephaestus, the god...

Il Duomo. August 7, 1420.

By the beginning of the 15th century, after a hundred years of construction, the structure was still missing its dome. The basic features of the dome had been designed by Arnolfo di Cambio in 1296. His brick model, 4.6 metres high, 9.2 metres long, was standing in a side aisle of the unfinished building, and had long been sacrosanct. It called for an octagonal dome higher and wider than any that had ever been built, with no external buttresses to keep it from spreading and falling under its own weight. The commitment to reject traditional Gothic buttresses had been made when Neri di Fioravanti‘s model was chosen over a competing one by Giovanni di Lapo Ghini. That architectural choice, in 1367, was one of the first events of the Italian Renaissance, marking a break with the Medieval ...

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