The medieval market of August Activity · Berlanga de Duero, Berlanga, Soria Image of Berlanga de Duero, not of the place itself. In mid-August the town recovers its condition as a market place with a medieval market that fills the arcaded main street, days before the festival of the Virgen del Mercado at the end of the month. Photo: Rowanwindwhistler (CC BY-SA 4.0) What to see and do in Berlanga de Duero