Spain, Andalucia, Cordoba, The Hypostyle Hall of the Mezquita Cathedral.

Spain, Andalucia, Cordoba, Detail of the lower part of the Capilla Mayor of the Mezquita Cathedral and arches of the Hypostyle Hall.

Spain, Andalucia, Cordoba, The Hypostyle Hall of the Mezquita Cathedral.

Spain, Andalucia, Cordoba, The Hypostyle Hall of the Mezquita Cathedral.

Spain, Andalucia, Cordoba, The Hypostyle Hall of the Mezquita Cathedral.

Spain, Andalucia, Cordoba, The Hypostyle Hall of the Mezquita Cathedral.

Ireland, Dublin, Dublinia Arch leading to Christchurch Cathedral.

Austria, Salzburg, Residenz Palace, View of the facade through an arch.

Uzbekistan, Tashkent, Bell tower and arch, Saint Uspensky Sobor Russian Orthodox Assumption Cathedral.

Uzbekistan, Tashkent, Bell tower and domes, Saint Uspensky Sobor Russian Orthodox Assumption Cathedral.

Uzbekistan, Samarkand, Gur Emir Mausoleum, also known as Gur Amir, Guri Amir, Gur-E Amir, and Gur-I Amir.

Uzbekistan, Samarkand, Entrance to Shah-i-Zinda, also known as Shah I Zinda and Shah-i Zinda.