What is the traditional Nubian art form — geometric patterns painted on the exterior walls of houses — called, and what material produces its distinctive white colour?

• A Fayoum mural fresco
• B Siwa kershef ornamentation
• C Nubian house painting (white from crushed limestone) ✓
• D Sinai geometric embroidery

Nubian house painting uses bold geometric patterns — triangles, diamonds, chevrons — rendered in white limewash (nura) on mud-brick walls, with plates, saucers, and ceramic tiles embedded in the plaster as decoration, a visual language that encodes family identity, marriage status, and protective symbols against the evil eye.