Bar-Ilan University researchers have used 3D virtual modelling to piece back together the broken shell of an egg laid 2,600 years ago. It has resolved a Rabbinic dispute over the size of Temple-era eggs, providing evidence that they were similar in size to those laid by hens today.

https://www.timesofisrael.com/2600-year-old-chicken-egg-shells-from-jerusalem-first-evidence-of-use-in-diet/