Surrounded by a fortified wall, the 16th-century city of Shibam is one of the oldest and best examples of urban planning based on the principle of vertical construction. Its impressive tower-like structures rise out of the cliff and have given the city the nickname of ‘the Manhattan of the desert’.

Brief synthesis The tall cluster of sun-dried mud brick tower houses of the 16th century walled city of Shibam, which rises out of the cliff edge of Wadi Hadramaut has been described as a 'Manhattan' or 'Chicago' of the desert. Located at an important caravan halt on the spice and incense route across the Southern Arabian plateau, the city of dwellings up to seven storeys high developed on a fortified, rectangular grid plan of streets and squares. The city is built on a rocky spur several hundred metres above the wadi bed, and superseded an earlier settlement that was partly destroyed by a massive flood in 1532-3. The Friday mosque dates largely from the 9th -10th century and the castle from the 13th century, but the earliest settlement originated in the pre-Islamic period. It became the capital of Hadramaut after the destruction in AD 300 of the earlier capital Shabwa, which was located further to the west along the wadi. In the late 19th century, traders returning from Asia regenerated the walled city and since then development has expanded to the southern bank of the wadi forming a new suburb, al-Sahil. Abandonment of the old agricultural flood management system in the wadi, the overloading of the traditional sanitary systems by the introduction of modern water supply combined with inadequate drainage, together with changes in the livestock management have all contributed to the decay of the city. The dense layout of Shibam surrounded by contiguous tower houses within the outer walls expressed an urban response to the need for refuge and protection by rival families, as well as their economic and political prestige. As such the old walled city of Shibam and its setting in Wadi Hadramaut constitute an outstanding example of human settlement, land use and city planning. The domestic architecture of Shibam including its visual impact rising out of the flood plain of the wadi, functional design, materials and construction techniques is an outstanding but extremely…