Luis Siret y Cels (Sint-Niklaas, 26 August 1860 – Herrerías, 7 June 1934) was a Belgian-Spanish archaeologist and illustrator. He was born in Belgium, but when he was 21 he went to Cuevas del Almanzora (Almería) when he was contracted as a Mining Engineer in the Sierra Almagrera. Though 50 years, Luis Siret and his brother investigated Neolithic, Chalcolithic and Bronze Age sites in , , El Argar, or Los Millares. His discoveries meant a great advance in the prehistory of the South-eastern Iberian Peninsula and helped settle the sequence from Palaeolithic to Iron Age in the zone.