The city of Aguadilla, comfortably nestled on the north-western coast of Puerto Rico, owes its birth and name to water. Its name literally translates as "a small place for water", which is directly linked to its historical role as a vital stopover for ships crossing the Atlantic. The heart of the settlement was the famous spring Ojo de Agua (Eye of Water), which for centuries served as an invaluable source of fresh water for mariners travelling from Europe to the New World. It was thanks to this natural spring and the convenient wide bay that the future city became a strategically important point on the map.
Although people lived in this territory earlier, the official history of the city begins in the 18th century. Initially, the lands of Aguadilla were part of the neighbouring district of Aguada. In 1775, with the start of the construction of the local church, the process of founding a new settlement began, which was named San Carlos de la Aguadilla. By 1780, it received the status of an independent community. A significant boost to population growth was provided by the migration of Spanish colonists here following the uprising in Santo Domingo, which contributed to the further development of the city.
Thanks to its port status, Aguadilla quickly turned into a thriving commercial centre. The city's economy relied on agriculture, particularly the cultivation of sugar cane and coffee, as well as fishing and active trade. In 1860, Aguadilla officially received the status of "villa" from the Spanish Crown, which strengthened its administrative and economic importance in the region. Cultural life was formed under strong Spanish influence, which is still noticeable today in the architecture, for example, in the appearance of the historic Cathedral of San Carlos Borromeo.