Photo Credit: Assaf Peretz / Israel Antiquities Authority.
Israel Antiquities Authority archaeologist Alla Nagorsky with the miraculously preserved 1000-year-old egg.

While excavating an ancient cesspit dating from the Islamic period (7th century CE), Israel Antiquities Authority archaeologists in Yavne were astonished to find an unbroken chicken’s egg.

The large-scale archaeological excavations, directed by Dr. Elie Haddad, Liat Nadav-Ziv, and Dr. Jon Seligman, have discovered an extensive and diverse industrial area dating from the Byzantine period, as part of the Israel Land Authority’s urban expansion project in the city.

Israel Antiquity Authority excavations in Yavne, 2021. / Emil Aladjem / Israel Antiquities Authority.
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“Eggshell fragments are known from earlier periods, for example in the City of David and at Caesarea and Apollonia, but due to the eggs’ fragile shells, hardly any whole chicken eggs have been preserved. Even at the global level, this is an extremely rare find,” says Dr. Lee Perry Gal of the IAA, a leading expert on poultry in the ancient world. “In archaeological digs, we occasionally find ancient ostrich eggs, whose thicker shells preserve them intact.”

“Even today, eggs rarely survive for long in supermarket cartons. It’s amazing to think this is a 1,000-year-old find,” says IAA archaeologist Alla Nagorsky, excavation director at the site where the egg was unearthed. “The egg’s unique preservation is evidently due to the conditions in which it lay for centuries, nestled in a cesspit containing soft human waste that preserved it.”

Poultry farming was introduced into Israel 2,300 years ago, during the Hellenistic and Early Roman periods. In the Islamic period, from the seventh century CE onward, there is a marked decrease in the percentage of pig bones at sites in the region, reflecting the prohibition on eating pork.

“Families needed a ready protein substitute that does not require cooling and preservation, and they found it in eggs and chicken meat,” explains Dr. Gal. “Unfortunately, the egg had a small crack in the bottom so most of the contents had leaked out of it. Only some of the yolk remained, which was preserved for future DNA analysis.”

Despite the extreme care with which the egg was removed, under the experienced supervision of a conservationist, the shell of the egg – preserved whole by the unusual anaerobic conditions – was cracked, but IAA conservationist Ilan Naor restored the egg to the state in which it was found.

Three bone dolls were also recovered from the same cesspit as the whole egg. / Gilad Stern / Israel Antiquities Authority.

How did the egg end up in the cesspit? We’ll never know. Interestingly, other exciting finds were retrieved from the same pit, including three typical Islamic-period bone dolls used as playthings some 1,000 years ago.

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