Coat of arms of Extremadura
The coat of arms of the Extremadura is described in the Title I of the Spanish Law 4 of June 3, 1985, the Law of the coat of arms, flag and regional day of Extremadura. The official description of the arms of Extremadura according to Law 4/1985 is: The shield is quartered, depicting in the first quarter the rampant lion of the Kingdom of León (with the field Or instead Argent); in the second, the castle of the Kingdom of Castile; in the third the columns represent the Pillars of Hercules, adopted as badge by King Charles I; and in the escutcheon is displayed the most common tree in the region. Almost the entire territory of Extremadura was conquered by Ferdinand II and Alfonso IX of León and the royal arms were introduced in the seal of the Badajoz. Later Extremadura was part of the Crown of Castile and the Pillars of Hercules with the motto were granted to the city during the reign of Charles I. The official blazon has been criticised by Spanish heraldists like Pedro Cordero Alvarado. He published a detailed study of errors related both to blazon and design together with its symbolic and historical significance.