The Our Lady of the Pillar Parish Church is located in Cauayan City in the province of Isabela. The story of the church traces back to September 1739, when Dominican missionaries first arrived in the area and established the settlement that would later be known as Cauayan. By 1741, the mission had grown into a full-fledged parish under Dominican administration, and it was placed under the patronage of Nuestra Señora del Pilar, from whom the church derives its name. This early foundation marked the beginning of Cauayan’s role as a center of faith in Isabela.