The Mosque of Cordoba in Spain underwent four stages of expansion and renovation over centuries. It began as a small mosque built by Abd al-Rahman I in the 8th century, and grew significantly under later Umayyad rulers. Key additions included doubling the number of naves, enlarging the courtyard, and building new minarets and mihrabs. In the 16th century, after the Reconquista, the mosque was converted into a cathedral but still retains many of its original Islamic architectural features like arched columns and horseshoe arches.