The three-tone system in Sant Climent de Taüll wall paintings: An imprint of medieval treatises 

Oriols Pladevall, Núria; Salvadó, Nati; Pradell, Trinitat; Jiménez, Núria; Juanhuix, Judith; Butí, Salvador (2023-05-19)

Medieval texts describe the use of the three-tone system as a pictorial procedure characteristic of Ro- manesque art to represent shape and volume. Some Medieval art treatises provide detailed instructions of its application, ...