Property of England .... realy... i Hope dr Zahi Hawas wins

the key to dicipher the hieroglyphs with Greek  and demotic carvings

Haha i give you the short story or read the longer part anyway

Short version

Napoleonn team discovered it, when the french where defeted England say it's there property,,  ( Property of England... realy ... Dr Hawass..... and even me...... not agree haha) 

the picture is Hq And show with enlarge the details see below on the next pic.

The stone was carved during the Hellenistic period and is believed to have originally been displayed within a temple, possibly at Sais. It was probably moved in late antiquity or during the Mamluk period, and was eventually used as building material in the construction of Fort Julien near the town of Rashid (Rosetta) in the Nile Delta. It was found there in July 1799 by French officer Pierre-François Bouchard during the Napoleonic campaign in Egypt. It was the first Ancient Egyptian bilingual text recovered in modern times, and it aroused widespread public interest with its potential to decipher this previously untranslated hieroglyphic script.

From French to British possession

After the surrender, a dispute arose over the fate of the French archaeological and scientific discoveries in Egypt, including the artefacts, collected by the members of the French commission. Menou refused to hand them over, claiming that they belonged to the institute. British General John Hely-Hutchinson refused to end the siege until Menou gave in. Scholars Edward Daniel Clarke and William Richard Hamilton, newly arrived from England, agreed to examine the collections in Alexandria and said they had found many artefacts that the French had not revealed. In a letter home, Clarke said that "we found much more in their possession than was represented or imagined".

Hutchinson claimed that all materials were property of the British Crown, but French scholar Étienne Geoffroy Saint-Hilaire told Clarke and Hamilton that the French would rather burn all their discoveries than turn them over, referring ominously to the destruction of the Library of Alexandria. Clarke and Hamilton pleaded the French scholars' case to Hutchinson, who finally agreed that items such as natural history specimens would be considered the scholars' private property. Menou quickly claimed the stone, too, as his private property. Hutchinson was equally aware of the stone's unique value and rejected Menou's claim. Eventually an agreement was reached, and the transfer of the objects was incorporated into the Capitulation of Alexandria signed by representatives of the British, French, and Ottoman forces.

do you want more info  go to

 

https://en.wikipedia.org/wiki/Rosetta_Stone

Patrons at the British Museum view the Rosetta Stone as it was displayed in 1985