Reales Atarazanas de Sevilla

The Royal Atarazanas was the Almohade entrance system to the city of Seville, that represented an increase in the number of obstacles to save in case of siege. 

Its location in the highest area of the environment, along with the advancement of the lines at the stake, fulfilled to perfection the major defensive guidelines. 

This entrance solution to the city was abandoned with the building of the Christian Atarazanas. Not so their structures, which continued in use until the end of the fifteenth century.