Pencak Silat Indonesian island, and displays the greatest diversity of techniques. Many Javanese schools such as Perisai Diri and Inti Ombak have been established internationally in Asia, Europe and America. Merpati Putih or "white dove" style was developed in the keraton (royal courts) of 17th century Mataram and was not taught publicly until 1963. Today it is the standard unarmed martial art of the Indonesian National Armed Forces. It includes weapons but focuses more on empty-handed self-defense and the development of internal strength developed through breathing techniques. Pencak silat in Java draws from traditional kejawen and Hindu-Buddhist Javanese beliefs but after Indonesia's
Pencak Silat being two aspects of the same practice. Pencak is the essence of training, the outward aspect of the art which a casual observer is permitted to witness as performance. Silat is the essence of combat and self-defense, the true fighting application of the techniques which are kept secret from outsiders and not divulged to students until the guru deems them ready. While other definitions exist, all agree that silat cannot exist without pencak, and pencak without silat skills is purposeless. The origin of the words "pencak" and "silat" have not been proven. Some believe that pencak comes from the Sanskrit