The Rosetta Stone: How It Unlocked Egyptian Hieroglyphs
The Rosetta Stone carries one decree in three scripts. Found in 1799, it let Jean-François Champollion decipher Egyptian hieroglyphs in 1822. Here is the story.
The Rosetta Stone is a slab of dark granodiorite inscribed in 196 BC with a single decree written in three scripts: Egyptian hieroglyphs, Demotic, and ancient Greek. Because scholars could read Greek, the stone gave them a key to the other two. French soldiers found it in 1799, and it became the foundation for deciphering Egyptian hieroglyphs, a script nobody had been able to read for about 1,400 years. It has been in the British Museum since 1802 and is one of the museum's most visited objects.
What is the Rosetta Stone?
The stone is a fragment of a larger stele, about 112 centimetres high, 76 centimetres wide, and 28 centimetres thick, and weighs around 760 kilograms. The text is a decree issued at Memphis in 196 BC by a council of priests honouring King Ptolemy V Epiphanes on the first anniversary of his coronation. It lists his benefactions, such as tax relief and gifts to temples, and orders copies to be set up in temples across Egypt.
The same decree appears three times. The top section has 14 surviving lines of hieroglyphs, the formal sacred script used by priests. The middle section has 32 lines of Demotic, the everyday script of Egyptian administration. The bottom section has 54 lines of ancient Greek, the language of the ruling Ptolemaic dynasty. The three versions say essentially the same thing, though not word for word.
How was the stone discovered?
In July 1799, during Napoleon's campaign in Egypt, French soldiers strengthening Fort Julien near the town of Rashid, known to Europeans as Rosetta, in the Nile Delta found the slab built into an old wall. Officer Pierre-François Bouchard recognised its importance. Scholars attached to the expedition made copies of the inscriptions. After the French defeat, the Treaty of Alexandria in 1801 gave the stone to the British, who shipped it to London in 1802. Egypt has asked for its return, and where such objects belong remains a disputed question.
How were hieroglyphs deciphered?
The Greek text was translated within a few years. Scholars such as Silvestre de Sacy and Johan Åkerblad then identified royal names in the Demotic text. The British polymath Thomas Young took the next step in the 1810s, realising that the oval rings called cartouches around some hieroglyph groups held royal names, such as Ptolemy, and he assigned sound values to some signs. But Young believed that most hieroglyphs were purely symbolic.
The breakthrough came from Jean-François Champollion, a French scholar who had learned Coptic, the last stage of the Egyptian language, which survives in Christian liturgy. Using the cartouches of Ptolemy and Cleopatra, he worked out the phonetic values of many signs. He then understood the crucial point: the writing system mixes signs for sounds with signs for whole words and with unpronounced signs that show meaning. In September 1822 he announced his results in a letter to a colleague, and he soon confirmed them by reading the names of pharaohs such as Ramesses and Thutmose in temple inscriptions, using the Coptic words for sun and born.
Why did hieroglyphs go unread?
Hieroglyphic writing declined as temples closed under Roman and later Christian rule. The last securely dated hieroglyphic inscription, at the temple of Philae, was carved in AD 394. Knowledge of the system faded, and for centuries scholars followed ancient authors who claimed that the signs were mystical symbols with hidden meanings, which sent generations in the wrong direction. Not every writing system has been recovered: the Voynich manuscript remains undeciphered. Egyptian writing was never purely pictorial. Like the International Phonetic Alphabet, though far older and less systematic, it partly records the sounds of speech.
What did decipherment unlock?
Reading hieroglyphs opened up three thousand years of texts: royal inscriptions, religious works such as the Pyramid Texts and the Book of the Dead, letters, accounts, and stories. It established Egyptology as a discipline and put Egyptian history on a firm footing. King lists and written records now cross-check physical dating methods, such as radiocarbon dating, and help interpret the layers revealed by archaeological stratigraphy.
The stone gave its name to a phrase: a "Rosetta Stone" now means any key that unlocks a hidden meaning. The European Space Agency named its comet-chasing Rosetta spacecraft after it, in the hope of decoding the early solar system, and its lander Philae after the island where the obelisk that helped Champollion was found. The idea that a single parallel text can unlock a lost language still guides modern decipherment, and it is why inscribed finds such as the Antikythera mechanism are valued so highly: a single legible line can change what we know.
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ancient egypt archaeology decipherment hieroglyphs writing systems