أحمد بن طولون
Ahmad ibn Tulun founded his own capital, al-Qata'i, north of the previous capital Fustat, where he seated his government. One of the dominant features of this city, and indeed the feature that survives today, was the Mosque of Ibn Tulun. The mosque is built in a Samarran style that was common in the period during which the caliphate had shifted capitals from Baghdad to Samarra. This style of architecture was not just confined to religious buildings, but secular ones also. Surviving houses of the Tulunid period have Samarran-style stucco panels.