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Friedrich Oscar Oertel (9 December 1862 – 22 February 1942) was a Kingdom of Hanover-born engineer, architect, and archaeologist. He is best known among Indian art historians and archaeologists for having excavated the archaeological site of Sarnath (India, Uttar Pradesh) in the winter of 1904–1905. It was here that in March 1905 he unearthed the Lion Capital of Ashoka of an Ashokan pillar, which was to become the national emblem of India. However, probably because he was mainly involved as a civil engineer and architect in the Public Works Department, his contributions to the fields of art history and archaeology are largely overlooked in the historiography of South Asian art and archaeology.