That very ancient relationship between man and dog.
The website Eye Witness to History has a lovely item on Mount Vesuvius:
On August 24, 79 Mount Vesuvius literally blew its top, spewing tons of molten ash, pumice and sulfuric gas miles into the atmosphere. A “firestorm” of poisonous vapors and molten debris engulfed the surrounding area suffocating the inhabitants of the neighboring Roman resort cities of Pompeii, Herculaneum and Stabiae. Tons of falling debris filled the streets until nothing remained to be seen of the once thriving communities. The cities remained buried and undiscovered for almost 1,700 years until excavation began in 1748. These excavations continue today and provide insight into life during the Roman Empire.
An ancient voice reaches out from the past to tell us of the disaster. This voice belongs to Pliny the Younger whose letters describe his experience during the eruption while he was staying in the home of his Uncle, Pliny the Elder. The elder Pliny was an official in the Roman Court, in charge of the fleet in the area of the Bay of Naples and a naturalist. Pliny the Younger’s letters were discovered in the 16th century.
If you are keen to read the full article then it may be found here.
My reason for quoting those opening paragraphs is because they offer a good historical introduction to another item from the BBC News website. That item is about a dog mosaic that is back on show after its restoration at Pompeii.
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Pompeii guard dog mosaic back on show

A vivid Roman dog mosaic is back on show after restoration at Pompeii, despite Italy’s problems funding the historical site’s conservation.
A glass shield now protects the House of the Tragic Poet, where tourists can see the dog with the inscription “Cave Canem” – Latin for “Beware of the dog“.
Frescoes at the house’s entrance were also restored. Ash from a volcanic eruption buried Pompeii in AD79.
A staffing dispute caused long queues at Pompeii on Friday, in searing heat. Pompeii gives visitors an extraordinary insight into everyday life in ancient Rome because many buildings were protected from the elements under the thick blanket of ash from Mount Vesuvius.

The site, near the southern city of Naples, has suffered from funding problems for years. Staff unions at Pompeii have criticised a management reorganisation there.
The House of the Tragic Poet has some of Pompeii’s finest examples of interior decoration, including scenes from Greek mythology.
But the house’s owners remain unknown – they may have died in the eruption along with many other Pompeii citizens.
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Now we all know that the relationship between dogs and man goes way, way back before Pompeii but, nonetheless, it’s rather nice to see dogs commemorated in this way from 1,936 years ago.