The Roman ceremony for the foundation of cities included an interesting ancestral rite: a priest marked a furrow in the land with a plough drawn by two oxen. The land that lay within the circle became holy land, and in it the city was built. On the furrow the city wall would be built. That exterior circle which surrounded the city was the cursus, our present Coso, which follows the line of the old Roman wall perfectly (in the palace of Los Condes de Morata one can clearly see how the building was built on the wall). In this street stand two renaissance palaces and the Teatro Principal.