Building buttresses to support your heavy dome is a good solution -- but it won't work here. When the magnificent Turkish cathedral Hagia Sophia collapsed only 20 years after it was built ...

After Dome of Cathedral of Saint Mary of the Flowers in Italy and Dome of Hagia Sophia in Turkey, Dome of Soltaniyeh is the third largest dome in the world. The dome registered in Iran's National ...

Most urgent is the preservation of its iconic dome, the underside of which is covered in mosaics, making structural ...

Built by the Romans 1,500 years ago, the Hagia Sophia was the biggest church in the world. No expense was spared: it contained coloured marble from around the Roman Empire and nearly 10,000 square ...