Answer: Calligraphy
In Islamic art, one of the most important decorative features of sacred sites is calligraphy, which is the art of beautiful handwriting. Calligraphy is used to decorate many Islamic buildings, including mosques, tombs, and palaces, and is often found on tiles, carpets, and other decorative objects.
Another important decorative feature in Islamic art is geometric patterns, which are often found on tiles, textiles, and other decorative objects. These patterns are created using geometric shapes such as circles, squares, and triangles, and are used to create intricate and complex designs.
Other common decorative features in Islamic art include arabesque patterns, which are decorative motifs that incorporate vines and leaves, and figurative imagery, which is rare in Islamic art due to the prohibition on depicting living beings in a religious context.
Overall, the decorative elements used in Islamic art are intended to create a sense of beauty, balance, and harmony, and are often used to depict important themes and messages in the Islamic faith.