In this study I have tried to reconcile the different dates proposed as the foundation of the towns and ministries in Ilocos. In instances where this was not possible, I adopted dates which seem probable; in others, where some dates appear as feasible as other dates given, I stated them without giving any judgment. There is; however, a town which is controverted by historians : Tuley, next to Vigan, the second oldest town in Ilocos, having been founded in 1576. It is called by Galende “Santa Catalina”—a name which makes the Town controversial. According to some, this town is the present Santa Catalina; according to others, Santa, both of which are in Ilocos Sur. Both these towns have Santa Catalina as patroness; both were called Santa Catalina in old documents. Only one, however, was sometimes called Tuley, the same parish which, it is claimed, had been founded by the Franciscans in 1579. In this study, I advanced reasons in an attempt to show that old Tuley was really Santa Catalina. On the other hand, I also mentioned reasons which show that Santa was really the old Tuley. After weighing the evidence, I concluded that Tuley is really the present municipality of Santa.