Linear A tablet
This is a Linear A tablet from Crete, dating to about 1450 B.C. The signs were written with a sharp point into a tablet of damp clay, which later was accidentally baked in a fire which destroyed the building it was in. This script, used to write the Minoan language, has never been deciphered. Many of the signs of the Linear B script (used to write Mycenaean Greek) seem to be derived from it. This tablet is approximately life-size on your screen.
Origin: Kasteli near Chania, Archaeological Museum of Chania (source of image).