Sigiriya Mirror Wall katapath bamma: vitrified lime glaze and ancient graffiti preservation?
What chemical burnishing and egg-white albumen binders created the porcelain-like glass sheen of the Sigiriya Mirror Wall?
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4 Answers from travellers
The 5th-century Mirror Wall (Katapath Bamma) at Sigiriya is a masonry brick parapet wall coated in a fine plaster glaze composed of slaked sea-shell lime, crushed quartz, egg white albumin, and plant mucilages. Burnished with smooth agates and treated with heated beeswax, the plaster developed a vitreous, porcelain-like gloss that once reflected King Kasyapa’s palace. Between the 8th and 10th centuries, ancient travelers inscribed over 700 classical Sinhala poetry verses directly into the glaze using sharp metal styli, providing invaluable linguistic records.
Visitors must never touch the delicate polished plaster surface; skin oils cause chemical degradation and promote fungal spore growth.
An overhanging rock gallery protects the wall from direct tropical monsoonal rain, preserving the reflective glaze across 1,500 years.
Located along the western gallery ascent path leading up to the lion gate terrace.
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