Which decorative art form, using small coloured pieces of stone or glass to create patterns, adorns many historic Islamic buildings in Cairo?

• A Fresco
• B Sgraffito
• C Intarsia
• D Mosaic ✓

Mosaic — the assembly of small coloured tesserae into intricate geometric and floral patterns — is a hallmark of Islamic decorative art found throughout Cairo's historic mosques, madrasas, and mausoleums.