The Katipunan, officially the Kataastaasang, Kagalanggalangang Katipunan ng mga Anak ng Bayan or Kataastaasan Kagalang-galang na Katipunan ng mga Anak ng Bayan (KKK; Supreme and Honorable Association of the Children of the Nation; Suprema y Honorable Asociación de los Hijos del Pueblo), was a Philippine revolutionary society founded by anti-Spanish colonialist Filipinos in Manila in 1892; its primary goal was to gain independence from Spain through a revolution.
Revolutionary documents from Archivo General Militar de Madrid rediscovered in the 21st century suggest that the society had been organized as early as January 1892 but may not have become active until July 7 of the same year; that was the date that Filipino writer José Rizal was to be banished to Dapitan.
Founded by Filipino patriots Deodato Arellano, Andrés Bonifacio, Valentin Diaz, Ladislao Diwa, José Dizon, and Teodoro Plata, the Katipunan was a secret organization until it was discovered in 1896. This discovery led to the outbreak of the Philippine Revolution.
The Katipunan being a secret organization, had its members subjected to the utmost secrecy and abidance to the rules established by the society. Aspiring applicants were given standard initiation rites in order to become members of the society. At first, membership in the Katipunan was only open to male Filipinos; later, women were accepted into the society. The Katipunan had its own publication, Kalayaan (Freedom) which issued its first and last printing in March 1896. Revolutionary ideals and works flourished within the society, and Filipino literature was expanded by some of its prominent members.
In planning the revolution, Bonifacio contacted Rizal for his full-fledged support for the Katipunan in exchange for a promise to rescue Rizal from his detention. In May 1896, the leadership of the Katipunan met with the Captain of a visiting Japanese warship in an attempt to secure a source of arms for the revolution, but without success. The Katipunan's existence was revealed to the Spanish authorities.