Sultan Khairun of Ternate: Ruler Killed by the Portuguese
Sultan Khairun ruled Ternate for roughly thirty-five years until Portuguese forces killed him in 1570. His death inside the Portuguese stronghold turned a tense, shifting relationship into open conflict. His son Baabullah succeeded him, besieged the fort and drove the Portuguese out of Ternate in 1575. The place most closely tied to Khairun is Fort Kastela on Ternate’s south-west coast, in Kastela village within the Pulau Ternate district of Ternate City, North Maluku.
Sultan Khairun and the Portuguese conflict on Ternate
The names vary. Khairun also appears as Hairun, and Portuguese-era spellings render it in other ways. Baabullah is also spelled Babullah or Baab Ullah. The fort is called Kastela or Kastella today, and its earlier names include São João Baptista and Gamlamo. These are not separate stories. They refer to the same ruler and the same strategic site, whose name shifted with the people who held it.
Why Khairun’s reign was politically difficult
Khairun ruled at a time when the clove trade made Ternate important to competing powers. The Portuguese had a fortified presence on the island close to the sultan’s earlier seat at Gam Lamo. Their position depended on political relationships as well as walls, ships and soldiers. The sultanate was not simply a supplier to a European outpost. It had its own authority, its own relationships across the wider region and its own interest in the islands where cloves grew and moved.
That is why cooperation and conflict existed side by side. A ruler could negotiate with the Portuguese when it suited Ternate and still resist attempts to control production or political decisions. The stronghold was useful to the Portuguese as a base in the spice trade, but it also pressed on the sultan’s independence. Khairun’s reign cannot be reduced to one continuous war or to a simple friendship. The balance moved over decades, and each agreement sat within a wider contest over who could command people, ports and clove supply.
The wider northern Maluku picture matters too. Ternate and Tidore were neighbouring sultanates with a long history of rivalry and shifting alliances. Their relationship was never fixed in opposition, and circumstances could bring them onto the same side. When you read about the Portuguese presence, remember that it was one piece of a wider balance in which both sultanates kept recalculating.
From negotiation to the killing of Khairun
Tension and talks ran side by side in the years before Khairun’s death. The two sides reached a reconciliation agreement late in his reign, but it did not settle the basic question of authority. The sultan wanted to govern Ternate and its interests. The Portuguese wanted to protect their position in the clove trade and keep their fortified base.
Khairun was killed inside the Portuguese fort in 1570. He went into the stronghold and did not leave it alive. The killing destroyed what trust remained between the two sides and gave his successor an immediate political cause for action. Chronologies differ on the exact day, so the year is the reliable anchor for the event.
The site is Fort Kastela, the principal Portuguese stronghold close to the earlier royal seat at Gam Lamo. Its names can confuse a search. São João Baptista was the Portuguese name, Gamlamo and Gamalama appear in later usage, and Kastela is the name most used for the surviving site today. Treat those names as clues to one landscape, not as separate attractions scattered around the island.
How Baabullah turned the killing into a siege
Khairun’s son Baabullah became sultan soon after his father’s death and demanded that those responsible be handed over. The Portuguese refused. Baabullah’s campaign then focused on the fortified position, and the siege that followed lasted several years. The Portuguese surrendered and left Ternate in 1575. That sequence is the clearest way to understand why the fort is linked with both Khairun’s death and Baabullah’s victory.
The siege should not be pictured as a single battle. Maintaining pressure over time and limiting the fort’s ability to operate freely mattered more than one dramatic assault. The outcome depended on the sultanate’s capacity to mobilise and sustain opposition. The fortress deteriorated during those years, so the surviving masonry does not show the fort at its height.
Tidore, Ternate’s rival, was not a fixed enemy in every phase of this crisis. Alliances in the region shifted with circumstances, and that is a reminder that rivalry was never a fixed script. To explore the other side of that relationship, read the Tidore guide. For Baabullah’s own rule and campaign, see Sultan Baabullah of Ternate.
What remains at Fort Kastela today
Kastela is a ruin rather than a preserved Portuguese town. The surviving remains are low stone walls and a ruined tower near the centre. The large fort complex that once held trading offices and living quarters is no longer visible. That gap matters for expectations. Khairun’s death and Baabullah’s siege were major events, but the physical visit is to fragments of a former stronghold, not a series of intact rooms.
A monument at the site marks Baabullah’s expulsion of the Portuguese in 1575. The visit therefore has two layers: the place where Khairun was killed, and the place remembered for the political result his death helped bring about. The monument is a later act of public memory rather than a reconstruction of the events.
Arrive with the basic sequence in mind. The Portuguese stronghold stood beside the earlier royal centre. Khairun was killed there in 1570. Baabullah’s forces besieged it, and the Portuguese left Ternate in 1575. That sequence gives meaning to a wall fragment or a tower remnant without pretending the stones narrate every detail. It also shows that a fort was both a military installation and a political statement placed close to the sultan’s seat.
Placing Kastela in a Ternate day
Fort Kastela is on the south-west coast, away from the northern city centre. Treat it as a dedicated southern stop rather than something beside the central palace and harbour sights. Start from the urban centre and follow the island’s coastal road towards Kastela village. A driver can confirm the current route and access, since the journey depends on your starting point and the road conditions on the day.
For a history-focused day, pair Kastela with the central Ternate story. The Ternate guide gives the island context, and Kastela supplies one decisive episode within it. Other forts on the island belong to different periods and powers. A fort elsewhere on Ternate should not be mistaken for the site of Khairun’s killing just because it also has Portuguese or later European associations.
Allow time to read the ground plan, find the central tower ruin and take in the monument as a memorial to Baabullah’s victory. The site rewards anyone interested in where island sovereignty, spice commerce and early European fortification overlapped. Anyone looking for intact architecture may find it modest. Anyone following the politics will see why its location near Gam Lamo mattered. The point is not that the ruin is unimportant, but that what survives physically is much less than what the site represents.
For the wider North Maluku picture, the North Maluku guide links Ternate to Tidore and the islands around them, which is where the rivalry and alliances that shaped Khairun’s reign are easiest to follow.
Keeping the names and dates straight
Before you read more about Khairun, try the spelling variants Khairun and Hairun, and Baabullah, Babullah or Baab Ullah. Use Kastela, Kastella, Gamlamo and São João Baptista as related names for the fort. Earlier spellings reflect the language used at different points in the fort’s history, not a different ruler or a different site. Variation in the date of Khairun’s death is a matter of chronology, not evidence of two separate events.
Keep the event separate from its later remembrance. Khairun was killed in 1570. Baabullah’s siege ended in 1575. The monument at Kastela commemorates the expulsion. These moments are connected but not interchangeable. The fort was a Portuguese stronghold during Khairun’s life, a focus of Baabullah’s campaign after his death, and a ruin carrying a public memorial today.
Questions about Sultan Khairun
Where was Sultan Khairun killed?
He was killed inside the Portuguese stronghold now known as Fort Kastela, in Kastela village on Ternate’s south-west coast. Earlier names for the fort include São João Baptista and Gamlamo.
Why did Baabullah besiege the fort?
Baabullah demanded that those responsible for his father’s killing be handed over. When the Portuguese refused, he led a campaign against the fort that ended with their departure from Ternate in 1575.
Is much of the fort left to see?
Not much. The site is largely ruin, with low stone remains, a ruined tower and a monument to the Portuguese expulsion. It is valuable mainly for its setting and its meaning rather than as a complete fortress.
Related guides: sultan nuku, sultan babullah airport, From Fort Malayu to Fort Oranje, kastela fort, Ternate Forts and Sultanate History: Sites, Rulers and Sequence.