Festividad de Santa Eulalia Historical milestone · Mérida, Tierra de Mérida - Vegas Bajas, Badajoz Image of Mérida, not of the place itself. Saint Eulalia, a 4th-century martyr already venerated in the Visigothic period, is the patron saint of Mérida. Her feast day, 10 December, is a local holiday in the city and is marked with religious events, a procession, and screenings and cultural activities around the basilica that bears her name. 10 de diciembre Photo: Rjcastillo (CC BY-SA 3.0) What to see and do in Mérida