Truth

Truth, a pastel of 1756 now in Houston, demonstrates Mengs's mastery across media: alongside his oil paintings and his famous ceiling fresco Parnassus, he produced a significant body of pastel work that reflects the mid-century fashion for the medium in Europe. The personification of Truth — typically depicted as a nude or semi-nude female figure with a mirror or sun — was a well-established allegorical type that Mengs could treat as a demonstration of ideal expression rather than as narrative. Pastel's capacity for soft blended transitions made it particularly suited to Mengs's preferred tonal approach, and the Houston work exemplifies this technical alignment. The date, 1756, places it in his first major Roman period, when he was developing the theoretical and practical programme that would culminate in the Parnassus fresco.

Pastel required a fundamentally different approach from oil: pigment was applied dry and blended with fingers or stumps, building up layers of colour without the medium's binding agent. Mengs's characteristic smooth transitions are achievable in pastel through careful layering, but the final surface has a different luminosity — matte and powdery rather than glazed.