Writers like Herodotus and Strabo visited an Egypt where priests still carved hieroglyphs. That world ended slowly. Temples closed under Christian emperors, the last priests died, and by the 5th century AD no one alive could read the script. It stayed unreadable for about 1,400 years.
Key idea
Why it works
Horapollo
The Hieroglyphica, a Greek book under the name of Horapollo, probably dates from the 4th or 5th century AD. It explains nearly two hundred signs, each as an allegory. A few meanings are right, but the reasons given are not. The book says a goose means "son" because geese love their young. In fact the bird sign used in the word for "son" (a pintail duck) writes the consonants zꜣ, the same consonants as the word itself: a sound pun, not a lesson about birds. The manuscript was found on the Greek island of Andros in 1419 and printed in 1505, and Renaissance scholars took it as the key to Egypt.
Athanasius Kircher
Kircher (1602–1680), a Jesuit scholar in Rome, published huge volumes on Egypt, including Oedipus Aegyptiacus (1652–1655). His "translations" turned short inscriptions on obelisks into pages of mystical philosophy. Yet he made one lasting contribution: he studied Coptic, the language of Egypt's Christians, and argued that it descended from the ancient language. He also saw that the water sign could stand for the sound m, matching the Coptic word ⲙⲟⲟⲩ "water". That Coptic link would later prove vital.
Worked example: How long was the script forgotten?
- Both dates are AD, so subtract: 1822 − 394.
- 1822 − 394 = 1428.
Answer: 1,428 years, or "about 1,400 years".
Worked example: Symbol or sound?
- The owl is the sound sign for m, one letter in a spelled-out name.
- He assumed every picture was a symbol. That is the error behind Horapollo and Kircher: they never tested whether the signs could spell words.
- A sound reading can be tested: the same signs must spell the same names wherever they appear. A symbolic reading cannot be tested at all.
Answer: The owl writes m; reading it as a symbol made the text unreadable.
Common mistake