A 9th-century refuge: Sawwar ibn Hamdun and the pre-Nasrid fortification
Before Granada had a single Nasrid stone in place, the western spur of the Sabika hill already had walls. The earliest documented fortification on the site dates to 889, during the civil strife, the fitna, tearing apart the Caliphate of Córdoba, to which Granada then belonged.[1] A local strongman named Sawwar ibn Hamdun took refuge in an existing fort on the hill and repaired it to withstand fighting between Arab, Muladi, and Berber factions contesting the emirate's weakening grip on the south.
Very little survives describing what that structure looked like. What matters is the sequence it starts: this pre-Nasrid fortification places the site's military life roughly 350 years before Muhammad I ever climbed the hill. Granada in 889 was a provincial town, not an independent kingdom, and its fort mattered because the Vega below it was contested ground during a decade of factional war. The refuge Sawwar ibn Hamdun repaired had none of the named towers visitors climb today. What it had was the same tactical logic every later builder, Zirid, Nasrid, Castilian, kept: a defensible spur where the hill drops toward the Darro river.
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Alcazaba, Granada
Granada's oldest fortress and the military core of the Alhambra, built in 1238. Its Watch Tower delivers panoramic views of the Albaicin and Sierra Nevada.
The Zirid citadel: al-Qasaba al-Jadida
When the Cordoban caliphate finally collapsed in the early 11th century, al-Andalus splintered into competing taifa kingdoms, and Granada became the seat of the Zirid rulers, Berber rulers whose fuller story belongs elsewhere. What concerns the Alcazaba is narrower: the Zirids built a new citadel on Sabika hill known as al-Qasaba al-Jadida, 'the New Citadel,' the term that eventually softened into the Spanish word alcazaba.[2] That name implies an older one: the Zirids' first citadel, the Alcazaba Cadima, stood on the Albaicín hill across the valley, and its own defensive wall survives there in fragments today.
This Zirid stronghold was considerably smaller than what stands today. It depended on a single onsite cistern for water, and its perimeter walls, studded with towers, descended toward the Darro valley rather than enclosing the full hilltop the Nasrids would later claim. A useful comparison sits a few hundred metres downhill in the Realejo: the Torres Bermejas, another set of Moorish defensive towers from roughly the same era, still standing as a reminder that 11th-century Granada was fortifying more than one hill at once. Neither structure resembled a palace. Both were built by people who expected to be attacked.
Muhammad I and the Nasrid refoundation of 1238
The turning point arrived in 1238, when a Granadan nobleman named Muhammad ibn Yusuf ibn Nasr, remembered as Muhammad I ibn al-Ahmar, founded the Nasrid emirate and moved his capital to Sabika hill.[3] The fuller political story of how he got there belongs to the Nasrid dynasty; what matters for the Alcazaba is that he did not start from nothing. He reused sections of the Zirid foundations to rebuild and enlarge the fortress, and completed an aqueduct that same year, supplying the hill with water and making the rest of the Alhambra hill possible.
This is the fact worth sitting with: the Alcazaba existed as a working military fortress before a single Nasrid palace was built beside it. Muhammad I is said to have lived briefly inside the fortress's Torre del Homenaje before purpose-built residential quarters went up elsewhere on the hill. The Alhambra that draws visitors today, with its stucco halls and courtyards, grew up around a fort that already had defensive walls, a garrison, and a water supply. Sequence matters here more than most guidebooks let on: defense first, decoration later, by roughly a full generation.
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The three towers of the Nasrid ramparts
Three towers built into the Alcazaba's ramparts define its Nasrid-era skyline: the Torre del Homenaje (Keep), the tallest of the three at 26 metres, the Torre Quebrada (Broken Tower), and the Torre de la Vela (Watch Tower), the one every visitor photographs from the Mirador de San Nicolás across the valley.[1] The Keep anchors the fortress's interior and may have briefly housed Muhammad I before his household moved to purpose-built quarters. The Torre de la Vela stands at the fortress's western tip, overlooking the city and the Vega plain stretching toward the Sierra Nevada foothills.
| Tower | Attributed to | Role |
|---|---|---|
| Torre del Homenaje | Muhammad I, 1238 campaign | Keep; possibly his first residence on the hill |
| Torre Quebrada | Disputed: Muhammad I (1238) or Yusuf I (14th c.) | Eastern rampart defense |
| Torre de la Vela | Muhammad I, 1238 campaign | Watchtower over the city and the Vega |
Torre Quebrada's construction date is one of the few genuine disputes in the Alcazaba's history. One account attributes it to Muhammad I's original 1238 campaign, alongside the other two towers; another attributes it to Yusuf I, a full century later. No source settles the question cleanly, and rather than pick a winner, it is worth simply noting the towers were not all raised at once. The Alcazaba, like the rest of the Alhambra hill, was a construction site for generations, not a single building project.
Torre de la Vela: the bell, the surrender, and the Día de la Toma
The Torre de la Vela's meaning shifts entirely at the end of the Nasrid period. On 2 January 1492, following Granada's surrender, the Castilian royal standard was raised over the tower, marking the end of nearly eight centuries of Muslim rule on the peninsula, an event covered in full in the Reconquista.[4] The Catholic Monarchs brought a bell from Castile known as La Vela, 'the sentinel,' to ring out the victory and, afterward, to regulate irrigation schedules for the farmland of the Vega below.
That bell has been recast more than once; the one that rings today dates to 1773.[5] Every 2 January, Granada marks the Día de la Toma (Day of the Capture) by ringing it continuously, a tradition the city still observes with an official ceremony. Local folklore held that any unmarried woman who climbed the tower to ring the bell herself would marry within the year, a piece of popular superstition rather than documented history, though guides still mention it on the day itself while watching tourists climb the stairs anyway.
Deep dive · Article
Abencerrajes of Granada: the noble clan behind the legend
Abencerrajes of Granada: the noble clan who shaped Nasrid court politics for a century and became legend through a massacre story set in the Alhambra.
Disaster and rediscovery: gunpowder, earthquakes, Napoleon, and Torres Balbás
Once the Alcazaba passed into Castilian hands, Spain spent roughly a century, from 1492 to about 1589, reinforcing it to withstand gunpowder artillery, even though the fortress saw almost no further combat. The upgrades did not spare it from disaster.
- 1590
Gunpowder magazine explodes near the Torre de la Vela
A blast beneath the tower forces repairs across several ramparts.
- 1522 & 1821
Earthquakes strike the Alhambra hill
Structural damage compounds across three centuries of use.
- 1812
Napoleonic troops mine the fortifications
Retreating French forces destroy part of the complex during the Peninsular War.
- 1923–1936
Torres Balbás excavates and restores the Alcazaba
Clearance work uncovers the fortress's residential and garrison quarter.
Three centuries of gunpowder and earthquakes
In 1590, a gunpowder magazine sited near the Carrera del Darro, directly beneath the Torre de la Vela, exploded and badly damaged the tower, forcing repairs to it and to several neighbouring towers.[6] The complex was shaken again by earthquakes in 1522 and 1821, damage layered on top of damage that later restorers would spend a century untangling.[7] None of this made international news at the time. It simply meant that the fortress visitors see today carries scar tissue from at least three separate disasters before Napoleon's troops ever arrived.
Napoleon's retreat and the twentieth-century excavation
As French troops withdrew from Granada in 1812 during the Peninsular War, they mined the Alhambra's fortifications, destroying the Torre de los Siete Suelos almost entirely (it was not rebuilt until the 1970s) and leaving the Torre del Agua in ruins; both towers sit elsewhere on the Alhambra hill, and the Alcazaba itself escaped the worst of the demolition.[8] The precise story of a soldier cutting a fuse before more could be blown up circulates widely online without a single clearly attributable source. Treat it as local legend until a primary account settles the details. Napoleon's plot to blow up the Alhambra covers the 1810–1812 occupation, the withdrawal order, and the soldier said to have stopped the fuses in full.
What is documented is the recovery. Between 1923 and 1936, architect and archaeologist Leopoldo Torres Balbás led the excavation and restoration that cleared centuries of accumulated rubble from the Alcazaba's interior and uncovered its residential and garrison quarter: the barracks, cisterns, and street layout of the soldiers and families who once lived inside the walls.[9] That work is the basis for what we now understand the Alcazaba to be: not simply a defensive perimeter, but a self-contained military settlement, distinct in function from the palatial quarters that rose beside it a century later.