Methodology impositione primarii lapidis: the Cathedral of Santa Maria de Tortosa

Abstract

The Gothic cathedral of Santa María de Tortosa (1347) is built on the Romanesque (1158), and this, in turn, on the grounds of the Turtusha mosque (c.717), and this, on the Roman building of Dertosa (c.100), oriented Ac.100 = 108, 64º, being compatible with the direction to the Kaaba in Mecca Ac.717 = 108, 25º. The Romanesque cathedral causes a redirection on the existing remains, with a more probable orientation A1158-Ii = 95, 50º and range (93.00º97, 99º), whose interval is between the canonical orientation from East to West, and in the topographic criterion of direction towards the top of the Creu (383m) ACreu = 97, 76º. The Gothic cathedral A1347 = 98, 17º is geometrically reconsidered on the Romanesque one as a ring road, justifying its difference.