La Mano Negra Historical milestone · Jerez de la Frontera, Área Metropolitana de Jerez, Cádiz Between 1882 and 1884, the Jerez district was the setting of the court case against the alleged anarchist secret society "La Mano Negra", one of the most controversial episodes of the 19th-century Andalusian farmworkers' movement. 1882-1884 Photo: El Pantera (CC BY 3.0) What to see and do in Jerez de la Frontera