Answer:
Republic of Biak-na-Bato is a designation referring to the second revolutionary republican government led by Emilio Aguinaldo during the Philippine Revolution, That government referred to itself as Republic of the Philippines (Spanish: República de Filipinas; in modern Filipino: Republika ng Pilipinas) and was seated in what is now Biak-na-Bato National Park. The current designation was adopted by historians to avoid confusion with name of the current Philippine government, which also refers to itself the Republic of the Philippines, and with other past Philippine governments using the same designation.
