Islamic art refers to art created by Muslim artists for Muslim patrons and for use in the Islamic faith. It is characterized by decorative elements like calligraphy, geometric patterns, and avoidance of images to comply with Islamic principles of aniconism. Common elements of mosques include minarets, courtyards, mihrabs indicating the direction of Mecca, and minbars for sermons, though their architectural styles vary greatly across regions, with influences from Roman and Byzantine precedents.