Evidence of lead poisoning and the co-occurrence of metabolic disease in Archaic/Early Classical (6th5th century BCE) Laurion, Greece.

Lead is one of the most toxic heavy metals and environmental pollutants on earth capable of adversely affecting every organ in the human body, with harmful short- and long-term effects. In the Laurion region of southeastern Attica, Greece, the extraction of silver-rich lead ores has been practiced since prehistoric times. This area was heavily mined during the late Archaic and Classical periods significantly contributing to Athens wealth and sovereignty. Mining and metallurgical activities declined towards late antiquity but resumed in the late 19^th century, continuing until the end of the 20^th century. Vestiges of these activities still dot the landscape posing potential environmental risks. Although the chemical effects of lead on the human skeleton are well-documented, the osteological imprint of lead contamination, especially in classical antiquity, remains unexplored. This paper examines lesions characteristic of lead poisoning found on the remains of a 2-year-old infant from Laurion dating to the Archaic/Early Classical period (6^th5^th century BCE). The study employs non-invasive techniques, including macroscopic analysis, digital microscopy, plain radiography, and micro-CT imaging, to assess the presentation, distribution, pathogenesis, and etiology of the lesions. Anatomical areas formed by endochondral ossification, including the metaphyses of the long bones, the sternal ends of mid-ribs, and the condyle(s) of the mandible, are affected by bone hypertrophy and the formation of lead lines or lead bands. Additionally, hyperplasia of the cranial vault is diagnostic of anemia, while lesions on the endocranial surface indicate encephalopathy, which is associated with high levels of lead exposure and is often fatal. The presence of lesions diagnostic of scurvy and those consistent with rickets further supports the co-occurrence of multiple metabolic diseases in the infant skeleton. The manifestation of these lesions can provide insights into the history of lead toxicity and its lasting effects.