How Did Champollion Decipher Egyptian Hieroglyphs on the Rosetta Stone?

The 1799 Discovery at Rashid & The Trilingual Decree

In mid-July 1799, French Napoleonic soldiers under engineering officer Pierre-François Bouchard were digging foundations for Fort Julien near the Nile delta port of Rashid (Rosetta) when they uncovered a 760-kilogram slab of dark granodiorite stele [1,2]. Inscribed upon its polished face was a royal decree issued in Memphis in 196 BC on behalf of Ptolemy V Epiphanes [1,2].

The stele contained the identical administrative decree recorded in three parallel scripts [1,3]:

1. Ancient Egyptian Hieroglyphs: The sacred formal script used by temple priests.

2. Demotic Egyptian: The cursive daily administrative script of the populace.

3. Ancient Greek: The official administrative language of the Hellenistic Ptolemaic dynasty [1,3].

Because scholars could read the Greek text fluently, the Rosetta Stone offered Western philologists the long-sought bilingual key to deciphering Egyptian hieroglyphs, which had become totally extinct around 400 AD [1,3].

"The Rosetta Stone presented the identical royal decree in three scripts: formal Hieroglyphs, daily Demotic, and readable Ancient Greek."

The 1,400-Year Fallacy: Horapollo and the Mystical Symbol Myth

For over a millennium, European attempts to decode hieroglyphs had been utterly paralyzed by the 5th-century treatise of Horapollo (Hieroglyphica), which claimed that every hieroglyphic sign was a purely mystical, allegorical picture rather than a phonetic alphabet [2,4]. Scholars believed a vulture meant "mother" because all vultures were female, or a goose meant "son" due to filial love, preventing any linguistic phonetic analysis [2,4].

In the 1810s, English polymath Thomas Young made the first crucial breakthrough: analyzing the oval rings known as cartouches, Young deduced that foreign royal names must be spelled out phonetically so Greek names could be pronounced by Egyptian speakers [1,4,5]. Young successfully deciphered the phonetic letters for P-T-O-L-M-Y-S (Ptolemaios), but mistakenly believed phonetic spelling was used only for foreign Greek rulers, leaving native hieroglyphs an unsolved pictographic riddle [1,4,5].

"Scholars were trapped for 1,400 years believing hieroglyphs were purely mystical allegories until Young proved royal cartouches contained phonetic letters."

Champollion’s Masterstroke: Coptic and the Living Phonetic Code (1822)

Jean-François Champollion, a prodigy fluent in over a dozen ancient languages including Arabic, Syriac, Chaldean, and crucially Coptic (the liturgical Christian descendant of the ancient Egyptian language), realized that ancient Egyptian grammar and vocabulary were preserved in Coptic speech [1,2,6].

In September 1822, Champollion received sketches of cartouches from the Abu Simbel temple built by Pharaoh Ramesses II centuries before the Greek Ptolemies [1,2,6]. Analyzing the cartouche containing a sun disc (Coptic Ra), an unknown sign, and two folded cloths (phonetic S-S), Champollion connected the middle sign to Coptic mes ("to give birth")—reading Ra-mes-su (Ramesses: "Ra has given birth to him") [1,2,6]. Hieroglyphs were not purely ideographic or purely alphabetic; they were a complex, simultaneous blend of figurative, symbolic, and phonetic characters in the same sentence [1,2,6].

Overcome with excitement, Champollion dashed into the Académie des Inscriptions in Paris, shouted to his brother "Je tiens mon affaire!" ("I’ve got it!"), and collapsed unconscious from physical exhaustion for five days before publishing his landmark Lettre à M. Dacier [1,2,7].

"By matching Coptic vocabulary with cartouches of Ramesses and Thutmose, Champollion proved hieroglyphs were a phonetic language, shouting "I’ve got it!" before collapsing."