Medieval market of Borja Activity · Borja, Campo de Borja, Zaragoza Image of Borja, not of the place itself. The medieval market of Borja is held as part of the historical re-enactment of the Catholic Monarchs' entry into the town in 1492, at the end of July, with a medieval market and craftspeople's camp in the Parque San Francisco, a royal cavalcade through the historic centre, and federated medieval combat in the Plaza del Mercado. Photo: José Luis Filpo Cabana (CC BY 3.0) What to see and do in Borja