The 1836 Carlist attack Historical milestone · Almadén, Valle de Alcudia, Ciudad Real During the First Carlist War, in 1836, Carlist bands attacked Almadén, whose quicksilver was one of the main sources of income of the Isabelline Treasury. The mining establishment was defended like any other military stronghold. 1836 Photo: Lluís Marià Vidal i Carreras (Public domain) What to see and do in Almadén