The website contains digitized versions of 1950s documents written by local school teachers to chronicle the different towns’ pre-colonial and colonial history, with lists of anecdotes and local customs.
You can start with Wikipedia and your local government website. Check their references so that you can read them directly from their sources. Another useful resource is the National Library Archive which is available online. The website may seem archaic, but it is quite informational as it contains the history of Philippine barrios and towns. The website contains digitized versions of 1950s documents written by local school teachers to chronicle the different towns’ pre-colonial and colonial history, with lists of anecdotes and local customs.