Ki Amuk cannon was used to protect the Karanghantu Port in Banten Bay.
According to legend, Ki Amuk was the incarnation of the cursed Sultanate of Demak soldier.
Si Jagur cannon in the Jakarta Fatahillah Museum yard is the "twin" of Ki Amuk.
The first reads "Aqibah al-Khairi Salamah al-Imani" which means "The fruit of all good is the perfection of faith".
The second inscription reads "La fata illa Ali la saifa illa Zu al-faqar, isbir ala ahwaliha la mauta" which means "There is no victor except Ali, there is no sword but Zulfiqar, thou shalt fear God (taqwa) all the time until death".