sentences:  Two theories exist.One states that Alvar García started its construction in 1091 inside the remains of a previous Romanesque Church of the Saviour, which was left in ruins as a result of successive Muslim attacks, and that Alfonso VII of Castile raised the money necessary to build it.Other historians believe the Cathedral to be the work of the maestro Fruchel in the 12th century coinciding with the repopulation of Castille led by Raymond of Burgundy.