Fundación de la villa de Gernika Historical milestone · Gernika-Lumo, Gernika-Bermeo, Bizkaia Image of Gernika-Lumo, not of the place itself. The town of Gernika was founded on 28 April 1366 by Tello de Castilla. 28 de abril de 1366 Photo: Pere prlpz (CC BY-SA 3.0) What to see and do in Gernika-Lumo