 In any case, we must point out its increasing significance, which is provincial council that is held in Barcelona in year 1564, under the chairmanship of the patriarch of Antioch, D. [[Fernando de Loazes]], who ratifies the feast day of Santa Tecla as an obligation day in all of the ecclesiastical province of Tarragona.The 19th century will be decisive for the analysis of the evolution of the festivities of Santa Tecla.During the first half of the mentioned century, the morphology, of the "[[castell]]s" (human towers) will be defined, as well as the role that these play within the celebration.