The parish of Santa Maria started as a chapel-of-ease (visita) of Narvacan, its neighboring town to the north, in 1567. The influx of the settlers after the full conquest of the Ilocos Region by the Spaniards greatly increased the population of Santa Maria. The chapel became an independent ministry in 1769 and was dedicated to the Virgin Mary under the title of Our Lady of the Assumption.[3] Besides economic progress, evangelical missions were expanded.