I don't know any if this three...
The great patriotic poem, "Mi Ultimo Adios" that was written by a great hero a night before he will be executed. That poem was a very powerful one that even you're not of the same race, you'll feel the spirit of nationalism running through heart!
"Noli me tangere" - a socio political novel that satirize the social cancer of the author's time but still widely applicable today!
"Florante at Laura" - a great masterpiece that was already unkown today that depicts the romance of two lovers but depicts a more political issues inside it!
... I'm sorry, bro, but these are only that I know that belongs to be one of the first that was published on the "Project Gutenberg"