What kinds of architectural decoration were used at the Umayyad Mosque of Damascus?

The architectural decoration of the Umayyad Mosque in Damascus is characterized by a rich variety of themes and motifs derived from diverse stylistic sources, including classical, Byzantine, and pre-Islamic traditions.1

Key elements of its decoration include:

• Mosaics and Marble: The mosque is noted for its extensive use of mosaics and marble, which were employed to create both aesthetic beauty and symbolic meaning.12
• Vegetal and Architectural Motifs: Large-scale vegetal designs and architectural motifs appear on the spandrels and soffits of arches. These are believed to have functioned as an iconographic program intended to symbolize an idealized paradise on earth.1
• Woodwork: Like other major mosques of the period, the structure was heavily decorated with woodwork.2
• Stylistic Diversity: The ornamentation reflects a blend of illusionistically rendered classical themes and hieratic Byzantine styles, showcasing the wealth of decorative vocabularies available during the early Islamic period.1

These decorative choices were not merely ornamental; they served to emphasize the structural lines of the building and establish a formal balance between the mosque's open courtyard and the covered qiblah facade.12