Medina-Sidonia Andalusia Spain Medina-Sidonia is an unspoilt, little known ancient hill-top town despite its important history. The town was one of Spain's most important ducal seats in the 15th century; producing an admiral who led the Armada against England. The village has a fascinating multifaceted character; with medieval walls and tidy narrow cobbled streets flanked by rows of reja-fronted houses.