persona

Theophilus «qui et Rogerus» (i. e. Rogerus de Helmarshausen?), presbyter et monachus ordinis sancti Benedicti, vir doctus et artifex, natus circa annum 1080, vixit in Stavelot (Belgia), post annum 1100 in Colonia, post annum 1107 fortasse in Helmarshausen, obiit post annum 1125.

Effigies viri in altario Rogeri de Helmarshausen

opus

De diversis artibus libri III (ca. anno 1123)

secundaria

Schedula diversarum artium (Universität Köln)

Theophilus' On Diverse Arts: The persona of the artist and the production of art... (Heidi C. Gearhart)

Fontes