Fundación de Segura y desastres del siglo XV Historical milestone · Segura, Goierri, Gipuzkoa Image of Segura, not of the place itself. Segura was founded by Alfonso X in 1256 as a fortified settlement; it suffered a plague epidemic in 1418 and a great fire in 1422. 1256, 1418, 1422 Photo: Arangoierri (Public domain) What to see and do in Segura