The inspiration of this collegiate church is the Cathedral of Zamora , which also influenced the design of other structures , such as the Old Cathedral of Salamanca. Construction began in the twelfth century , one of the works most characteristic of the Romanesque in the transition phase . The dome of this Collegiate is part of a group known as the Leon cathedral domes formed by Zamora , Plasencia and Salamanca old cathedral ... group works spread more than usual since it began in the last third of twelfth century and ended in the mid- thirteenth century.
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