British Museum - The Rosetta Stone

I was especially looking forward to seeing the Rosetta Stone. All those years in Linguistics classes taught me the importance of having a key when translating, especially when trying to crack the code of a dead or newly discovered language.

Here is a quick wikipedia explanation as to why it is so important:

The Rosetta Stone is a fragment of an Ancient Egyptian granodiorite stele, the engraved text of which provided the key to the modern understanding of Egyptian hieroglyphs. The inscription records a decree that was issued at Memphis in 196 BC on behalf of King Ptolemy V. The decree appears in three texts: the upper one is in ancient Egyptian hieroglyphs, the middle one in Egyptian demotic script, and the lower text in ancient Greek.