The museum shows beautiful lanterns used at the Crystal Rosary - a nocturnal procession of carriages and glass lanterns celebrated on October 13.
Wikipedia (Spanish) http://es.wikipedia.org/wiki/Museo_de_los_Faroles_y_Rosario_de_Cristal
Address Plaza de San Pedro, 50001 Zaragoza, Spain
Coordinates 41°39'8.334" N -0°52'37.722" E