Gallur, collateral for a Navarrese loan Historical milestone · Gallur, Ribera Alta del Ebro, Zaragoza Image of Gallur, not of the place itself. In 1209 the king of Aragon requested a loan from the Navarrese monarch and handed over as security the castle and the villa of Gallur, situated on the frontier line between the two kingdoms. Already in 1147 the stronghold had been the scene of a clash between Navarrese and Catalans. 1209 Photo: chisloup (CC BY 3.0) What to see and do in Gallur