Hassan Tower
The majestic minaret of an incomplete mosque, standing 44m high. A masterpiece of Almohad architecture Commissioned by Yaqub al-Mansur.
Hassan Tower
صومعة حسان
Hassan Tower, also known as Tour Hassan, is one of the most important landmarks in Rabat. It is the minaret of an unfinished mosque commissioned in 1195 by Abu Yusuf Yaqub al-Mansur, the third Caliph of the Almohad Caliphate. The tower was intended to become the largest minaret in the world, part of a mosque planned to be among the largest ever built. Standing on the high southern bank of the Bou Regreg River and built from reddish sandstone, it now forms part of a major historical complex alongside the unfinished mosque and the Mausoleum of Mohammed V.
The Vision of Yaqub al-Mansur
Yaqub al-Mansur ruled the Almohad Caliphate, a Berber Muslim empire that extended across the Maghreb and Iberia. In the 12th century he launched an ambitious project in Rabat, intending to build a monumental mosque that would reflect the power, faith, and grandeur of his rule.
Some accounts suggest the tower was designed by the astronomer and mathematician Jabir ibn Aflah, who is also said to have designed the Giralda of Seville. Hassan Tower, the Giralda, and the Koutoubia Mosque in Marrakesh are often described as "three sister towers," all modelled on the Koutoubia minaret and influenced by the ancient Lighthouse of Alexandria.
An Ambitious Mosque Left Unfinished
The mosque was planned on a monumental scale — among the largest in the world, built on a rectangular site of about 190 by 140 metres, larger than the Great Mosque of Córdoba. The prayer hall was planned to contain 21 naves separated by rows of columns.
When Yaqub al-Mansur died in 1199, construction stopped and was never resumed on the same scale. The tower reached only about 44 to 45 metres — roughly half its intended height of around 80 metres or more. Only the beginnings of several walls and 348 columns were completed, and these still stand today, giving visitors a sense of the original project's scale.
Architecture of Hassan Tower
Hassan Tower is a square tower of reddish sandstone, its exterior decorated with sebka patterns, engaged columns, and carved capitals. Each side features blind lobed arches, and a pattern of lozenges near the top mirrors that of the Giralda in Seville.
Unlike many towers that use stairs, Hassan Tower was designed with ramps, which would have allowed the muezzin to ride a horse to the top to deliver the call to prayer. Inside are six floors connected by a continuous ramp, each with a vaulted chamber lit by horseshoe-shaped windows.
A Mosque, a Fortress, and a Symbol of Power
Placed on the high southern bank of the Bou Regreg, the mosque had a commanding presence visible from far away. As the surrounding area was thinly populated, historians believe it may have served a double purpose — both a place of worship and a fortress — and that al-Mansur intended to make Rabat his new imperial capital, rivalling the Mosque of Córdoba.
Damage and Survival
In 1755, the Lisbon earthquake damaged the unfinished mosque and destroyed much of what had been built. Despite this, the tower and the remains of the mosque survived, preserving the memory of Yaqub al-Mansur's grand vision. Today the site brings together the tower, the mosque's walls and columns, and the nearby Mausoleum of Mohammed V.
Connection to Moroccan Independence
After Morocco gained independence in 1955, King Mohammed V led the first Friday prayers from this symbolic location, connecting the monument to Morocco's modern history. The adjacent Mausoleum of Mohammed V strengthens the site's role as a place of memory, sovereignty, and national identity.
World Heritage Status
The Hassan Tower site was added to UNESCO's World Heritage Tentative List on 1 July 1995 and granted World Heritage status in 2012 as part of Rabat's historic and cultural heritage.
Visiting Hassan Tower Today
Hassan Tower remains one of Rabat's most visited landmarks. Although the interior was closed to the public after architects noticed signs of deterioration, the site remains powerful and sacred. Daily calls to prayer are still held there, and the monument continues to stand as a symbol of vision, faith, power, and memory — its incomplete form telling the story of a monumental dream interrupted by history.