Segovian sgraffiti symmetry: Friezes
DOI:
https://doi.org/10.3989/ic.10.065Keywords:
Sgraffito, frieze, border, plaster, symmetryAbstract
A new perspective is proposed to assess the sgraffiti that cover the walls of many palaces and houses of the Segovia town, a World Heritage Site since 1985. The mathematical theory of symmetry classifies the friezes of the plane in 7 algebraic groups, called frieze groups. In this work, symmetries of numerous sgraffiti friezes in the town of Segovia have been analysed and classified, and all seven frieze groups have been found. Counting the samples of sgraffiti for each frieze group their frequency distribution has also been obtained. Knowledge of this distribution can help prioritize restoration of those sgraffiti belonging to less frequent symmetry groups, which are facing extinction.
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