The City of David, across from the Western Wall, is asking its Facebook readers to suggest answers to mysterious 3,000-year-old carvings.

Its Facebook page states, “In an archeological excavation carried out by the Israel Antiquities Authority in the City of David, a discovery was made that continues to perplex archeologists and laymen alike.

“The discovery was made in a complex carved out of the bedrock near the Gihon Spring.  The archeologists – Professor Roni Reich and Mr. Eli Shukrun believe that the discovery is dated sometime between the 18th Century BCE and the 8th Century BCE.

“If one of our Facebook Friends has seen something similar to this anywhere in the world, we would be very happy if you would let us know a.s.a.p.  Perhaps together we can solve this mystery!”

The V-shaped carvings were cut into the limestone floor, and each V is approximately 2 inches deep and 20 inches long.

The archaeologists at the dig cannot find any clues that explain why the shapes were carved and what they mean. ”The markings are very strange, and very intriguing. I’ve never seen anything like them,” Eli Shukron told the Associated Press.

Excavations at the City David have been ongoing for a number of years, and the room is located near the only natural water supply to Old Jerusalem. One interesting clue is that the walls were built in very straight lines and the floors are very level, indicating that the structure was important to whoever built it.

A century-old map of an expedition led by the British explorer Montague Parker 100 years ago includes the shape of a ”V” drawn in an underground channel not far away, AP noted.

Another fact that may, or may not, be a clue is that is not known if the room were built during Jewish rule of Jerusalem or by idol worshippers centuries beforehand.

One more clue: a stone, similar to a grave marker of today, was found upright in the room and may date back to a pagan era.