As we know, Simón de Monasterio committed to the contractual obligation to continue and finish the “third” part of the Church, that is, the flat head with which the Church is finished, which we believe had to be finished before 1613, since this year the dome and one of the two towers were finished, missing the other that was about to be finished.
The technical expertise shown by Simón de Monasterio in terms of covering the space by means of barrel vaults and cupola will be highlighted later in the contract for another Jesuit work, this time it is the Clergy of Salamanca; in one of his clauses “it was foreseen that the Monastery would raise the vaults and the dome of the temple, at which point he had demonstrated his expertise during the construction of the same elements in the Church of the College of Monforte.”
As we see the good work of Simón de Monasterio and the magnificent result of his work in Monforte were shown for another of the great Spanish monuments of Jesuit trace, whose works began in 1617 under the protection of Margarita de Austria, wife of Felipe III, at to appear as an act of reparation to the order for the prison suffered by its founder, Ignacio de Loyola, by the Inquisition in the mocha tower of the Cathedral of Salamanca. Completing in 1754.