Islamic architecture has evolved over time, borrowing from neighboring civilizations. Mosques are the most notable building, originally being open courtyards but now featuring elements like minarets, mihrabs, and minbars. Major mosques include the Grand Mosque in Mecca housing the Kaaba, the Dome of the Rock in Jerusalem, and the Blue Mosque in Istanbul modeled after Hagia Sophia. Regional variations exist like the ziggurat-style minaret in Samarra, Iraq and dome shapes in Iran. Mughal architecture fused Islamic and Hindu styles. The Taj Mahal is a famous mausoleum. Moorish architecture in places like the Alhambra and Mesquita