Ancient Church Mosaics Uncovered in Israel

The Christogram in the mosaic may look like a cross, but it's actually more like a "chi rho" symbol, which puts together the first two captial letters in the Greek word for Christ.

(Image credit: Courtesy of Davida Eisenberg Degen, Israel Antiquities Authority)

Update: The article was updated on Jan. 23 at 9:55 a.m. ET to include comments from an archaeologist at the site.

Archaeologists in Israel have uncovered intricate mosaics on the floor of a 1,500-year-old Byzantine church, including one that bears a Christogram surrounded by birds.

The ruins were discovered during a salvage excavation ahead of a construction project in Aluma, a village about 30 miles (50 kilometers) south of Tel Aviv, the Israel Antiquities Authority (IAA) announced Wednesday (Jan. 22). Excavator Davida Eisenberg Degen said the team used an industrial digger to probe a mound at the site, and through a 10-foot (3 meters) hole, they could see the white tiles of an ancient mosaic.

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Much of the church was revealed during excavations over the past month. The basilica was part of a local Byzantine settlement, but the archaeologists suspect it also served as a center of Christian worship for neighboring communities because it was next to the main road running between the ancient seaport city of Ashkelon in the west and Beit Guvrin and Jerusalem in the east. [See More Photos of the Amazing Byzantine Mosaics]

At the time, Byzantine Christians wouldn't have put crosses on their mosaic floors so as to not step on the symbol of Christ, Degen explained. The Christogram in the mosaic may look like a cross, but it's actually more like a "chi rho" symbol, which puts together the first two captial letters in the Greek word for Christ, and often looks like an X superimposed on a P. There is an alpha and omega (the first and last letters of the Greek alphabet) on either side of the chi rho, which is another Christian symbol, as Christ was often described as the ""the beginning and the end." Four birds also decorate the mosaic, and two of them are holding up a wreath to the top of the chi rho.

The mosaics in the main hall, or nave, meanwhile, are decorated with vine tendrils in the shape of 40 medallions, one of which contains the Christogram. Many of the other medallions contain botanical designs and animals such as a zebras, peacocks, leopards and wild boars, the excavators said. Three contain inscriptions commemorating two heads of the local regional church named Demetrios and Herakles.

To avoid building over ancient sites, archaeologists are often brought in for salvage digs ahead of construction projects like this one, sometimes yielding stunning discoveries; for instance, a "cultic" temple and traces of a 10,000-year-old house were discovered at Eshtaol west of Jerusalem in preparation for the widening of a road. And during recent expansions of the main road connecting Jerusalem to Tel Aviv, called Highway 1, excavators found a carving of a phallus from the Stone Age, a ritual building from the First Temple era and animal figurines dating back 9,500 years.

Megan has been writing for Live Science and Space.com since 2012. Her interests range from archaeology to space exploration, and she has a bachelor's degree in English and art history from New York University. Megan spent two years as a reporter on the national desk at NewsCore. She has watched dinosaur auctions, witnessed rocket launches, licked ancient pottery sherds in Cyprus and flown in zero gravity. Follow her on Twitter and Google+.