The Mosque-Cathedral of Córdoba is one of the most arresting buildings in Europe, partly because it cannot quite decide what it is.

It was built in 786 by the Umayyad prince Abd al-Rahman, who had fled Damascus after his family's massacre. It eventually grew through four expansions until it could hold 30,000 worshippers, becoming the second largest mosque in the world after Mecca. When the Christians conquered Córdoba in the 1200s, they left the Islamic structure standing but inserted a Gothic nave through its heart. Charles V, who ordered that intervention, reportedly regretted it.

Inside, rows of red and white double-tiered arches create a hypnotic rhythm. The bell tower conceals a tenth-century minaret within its Renaissance stonework.

VoiceMap's tours trace the building's layered identity, following its expansions from a modest Friday mosque to a caliphal monument. They unpick how Muslim, Visigothic and Christian elements ended up woven into the same walls.