National hero Prince Diponegoro, who led a lengthy and impactful resistance against Dutch colonial rule in the 19th century, possessed a sacred heirloom kris known as Kiai Bondoyudo, also referred to as Ki Ageng Bondoyudo. This kris is a significant cultural artifact linked directly to the Javanese prince’s power and legacy. Details surrounding the kris are emerging as historical research continues into Diponegoro’s life and struggle. The weapon is considered a *pusaka* – an object imbued with spiritual power – and played a role in the prince’s identity as a leader. Its existence highlights the intersection of Javanese spiritual beliefs and the fight for independence. Further study of Kiai Bondoyudo promises to offer deeper insights into Diponegoro’s motivations and the cultural context of his resistance.