Gaillon Leave a Comment / Uncategorized / By admin The Château de Gaillon is located in Gaillon in the department Eure in the Normandy region. The gatehouse of the Château de Gaillon. Train París Saint Lazare to Gare Gaillon Aubevoye in 1 hour. In Gaillon Aubevoye bus 6B to Gaillon Mairie. The courtyard The Château de Gaillon is a Renaissance residence, built on the site of a medieval castle in the 11th century. The chapel. The courtyard. The kitchen. The garden.