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Hieroglyphics were used by the Egyptian civilization, and constituted the formal writing system of the Egyptians. They became decipherable after the discovery of the Rosetta Stone. 

Hieroglyphics were used by the Egyptian civilization.

The hieroglyphics were a writing system invented by the ancient Egyptians. It was used from the pre-dynastic period until the 4th century.

It is characterized by the use of signs, whose meaning is known thanks to the deciphering of the texts contained in the Rosetta Stone, which was found in 1799.