Secondary sources mentioned that Meycauayan exists as a Province in 1578. It was said the Augustinians Christianized Bulacan (the town after which the province was named). were in fact Bulacan "the town" was already a visita of Tondo in 1575 and Calumpit where Malolos and Hagonoy belong in 1572. The province of Bulacan is on the island of Luzon, and is one of the most important "Alcadia de Termino", Civil and politically it corresponds to the "Audiencia y capitanía general de Filipinas", and spiritually belongs to the Archbishop of Manila. The Franciscan friars Juan Plasencia and Fray Diego de Oropesa founded Meycauayan in 1578, and for a time it was the capital of the Province of Meycauayan (differ from the Western Bulacan administered by Augustinian Order since 1572) Meycauayan people were able to flourish and became so rich that the sons are six of the best in the then Province of Meycauayan. It was the towns of Bocaue, Polo, San Jose del Monte, Santa Maria de Pandi, Obando and Marilao).