Medieval Days of Mansilla de las Mulas Activity · Mansilla de las Mulas, Esla-Campos, León Image of Mansilla de las Mulas, not of the place itself. Held around 25 July, they bring together a craft market on the Plaza del Grano and knightly jousting beside the wall, at the postern gate. At night witch trials and burnings are re-enacted, and they close with medieval concerts. Photo: José Antonio Gil Martínez from Vigo, Spain (CC BY 2.0) What to see and do in Mansilla de las Mulas