The British Museum has released this nifty 3D scan of the Rosetta Stone, which includes a nice autoplaying audio summary of its significance.
One of the most important archaeological finds of all time, its decree in three languages allowed scholars to unlock the meaning of Egyptian hieroglyphics.
Part of grey and pink granodiorite stela bearing priestly decree concerning Ptolemy V in three blocks of text: Hieroglyphic (14 lines), Demotic (32 lines) and Greek (54 lines). The inscription is a decree passed by a council of priests, one of a series that affirm the royal cult of the 13 year-old Ptolemy V on the first anniversary of his coronation.
• Rosetta Stone (Sketchfab via MyModernMet)