By 1571, a decade after its initial proposal, a large part of the monastery was practically finished. However, it was not until 1586 that the construction of the final building, the Catholic temple, was completed. Philip II supervised all the works, until the Basilica was eventually consecrated in 1595. The decoration of the rooms would then continue for a few more years, and it was not until the reign of Philip IV, grandson of Philip II, that the Pantheon of Kings became a royal burial place.