Cairo Citadel

The Citadel is where Egypt was ruled for seven hundred years: the fortress Saladin began in 1176 on a spur of the Muqattam hills — positioned for the breeze and the sightlines, defensible against Crusaders who never came — that housed every subsequent dynasty from Mamluk sultans to Muhammad Ali's khedives until the 19th century moved the court downhill. It remains Islamic Cairo's crown: ramparts, palaces and three mosques from three eras, with the whole thousand-minaret city spread below its terraces and, on clear days, the pyramids ghosting the horizon.

The postcard is the Muhammad Ali Mosque — the "Alabaster Mosque" — whose Ottoman domes and pencil minarets crown the skyline from everywhere in Cairo, built by the Albanian commander who seized Egypt after Napoleon's exit and modernised it ruthlessly (the mosque's courtyard clock, a gift from France in exchange for the obelisk now in Paris's Place de la Concorde, has famously never worked — Cairo tells the story with relish). The interior is a single vast Ottoman space under cascading domes and low-hung lamp constellations, alabaster-clad and theatrical; Muhammad Ali himself lies in the Carrara tomb by the entrance. The connoisseur's counterpoint is next door: the 14th-century Mosque of Al-Nasir Muhammad, Mamluk-austere with recycled pharaonic columns, and the terrace behind it — the Gawhara viewpoint — delivering the city panorama that explains why Saladin chose this rock. The National Military Museum and the Police Museum pad the compound for completists; the courtyards and views are the substance.

Craft: go morning for the light on the city (haze builds by noon) or late afternoon for the golden version; dress modestly (shoulders/knees; shawls available at the mosque door, shoes carried inside); and budget two hours for the compound at a fair pace. The skip-the-line products matter on Fridays and holidays. The stacking is classic Islamic Cairo: the Citadel pairs with Sultan Hassan and Al-Rifa'i mosques directly below (the two giants framing the approach road are arguably finer buildings than anything inside the walls), then Khan el-Khalili for the evening — fortress, masterpiece, bazaar, in the correct order.