Frédéric Cailliaud discovers the Roman emerald mines at Sikait

Historical Context. The emerald mines at Sikait, or Mons Smaragdus, are the oldest known emerald mines in the world. Although ancient Egyptian activity is noted, most mining dates to the Roman and Byzantine periods. The site was famous in antiquity, mentioned by Pliny and Ptolemy, but its location was lost for many centuries until the 19th century.

Cailliaud's Expedition. Frédéric Cailliaud, a French naturalist and mineralogist, traveled through Egypt and Nubia. In 1817, he arrived near Wadi Sikait, an area he associated with Pliny's legendary emerald mines. Although primarily searching for sulphur, his knowledge of classical geography led him to identify the site as the lost Roman emerald mines.

Archaeological Importance. The discovery confirmed the location of the only emerald mines in the Roman Empire. Excavations at the worker camp at Sikait date the settlement's founding to the 3rd century BC. The site includes a temple dedicated to Serapis, built by Romans after the pharaohs, highlighting its continuous historical importance.