Islamic architecture synthesizes various artistic influences, including Byzantine, Roman, and Persian styles, characterized by abstract decorations and vivid colors, while avoiding realistic depictions of living beings. Courtyards and gardens play integral roles in Islamic culture, serving both aesthetic and functional purposes, with notable architectural features such as hypostyle halls and domes evolving from earlier traditions. Regional variations, including Indo-Islamic, Turkistani, and Sino-Islamic architectures, reflect local styles and innovations while maintaining essential Islamic design principles.