[3] When Batanes became a part of the Philippines and as a consequence, a Spanish colony, Mahatao was founded as an ecclesiastical mission by the Dominicans in 1783.

[3] It was first a dependency of Basco, and placed under the advocacy of St. Bartholomew the Apostle but its patron saint and protector became St. Charles Borromeo later on, as stated in a report by Lieutenant Governor Joaquin del Castillo on May 6, 1792.

It was initially made of light materials but underwent modifications that by the time Mahatao evolved from being a visita to a vicariate under Fr.

Crescencio Polo saw to the reconstruction of a stronger and more artistic structure in 1873,[3] covering the roof with cogon.

[2] Its interiors, decorated in Baroque style, showcase floral designs sunburst ornaments painted in polychrome and gilt which lends a golden glow among the statuary.