A New York Times article A Is for Ancient, Describing an Alphabet Found Near Jerusalem reports:

Archaeologists digging in July at the site, Tel Zayit, found the inscribed stone in the wall of an ancient building. After an analysis of the layers of ruins, the discoverers concluded that this was the earliest known specimen of the Hebrew alphabet and an important benchmark in the history of writing, they said this week.

Experts in ancient writing said the find showed that at this stage the Hebrew alphabet was still in transition from its Phoenician roots, but recognizably Hebrew. The Phoenicians lived on the coast north of Israel, in today’s Lebanon, and are considered the originators of alphabetic writing, several centuries earlier.

The discovery of the stone will be reported in detail next week in Philadelphia.