This penetrating portrait by Sebastiano del Piombo is among the earliest likenesses executed on stone. Trained in Venice by Giovanni Bellini and Giorgione before his move to Rome, where he worked in collaboration with Michelangelo and in rivalry with Raphael, Sebastiano was one of the leading artistic figures of his day. A brilliant visionary, he worked across a wide range of supports. Although his frescoes remain among his most celebrated works, arguably his most important contribution was the introduction of stone as a support for painting. Executed in Rome during the first half of the 1530s, when his experiments with this medium are first recorded, the present work marks a pivotal moment in his career and embodies one of the most innovative aspects of his practice.

Sebastiano’s reasons for adopting stone as a support remain the subject of scholarly debate. Bishop Vittore Soranzo (1500–1558) in his letters to the scholar Pietro Bembo (1470–1547) praised it as ‘pittura poco meno che eterna’ (painting little less than eternal), and the appeal of this seemingly durable medium could therefore be understood in the context of the devastation caused by the Sack of Rome in 1527. Yet, this notion sits uneasily alongside contemporary accounts – including Sebastiano’s own – that acknowledge the material’s inherent fragility. His use of stone has also been considered within the framework of the paragone – the debate concerning the relative merits of painting and sculpture – particularly with regard to permanence. In this context, however, ‘eternal’ was likely intended in a symbolic rather than literal sense. More plausibly, Sebastiano’s experimentation was aimed at harnessing the unique artistic properties of the smooth support to achieve the levels of illusionism sought by any leading portraitist. As art historian Elena Calvillo has suggested, the stone support itself may also have functioned metaphorically as a touchstone – traditionally used to test the purity of precious metals – thereby reinforcing both the authenticity of the sitter’s likeness and the integrity of his character.

The present portrait fully demonstrates the expressive and technical potential of this innovative support. The finely polished slate allowed the application of delicate, while its impermeable surface intensified the deep blue and grey tones, enhancing the dramatic chiaroscuro characteristic of Sebastiano’s Roman works. Beyond capturing the sitter’s commanding physical presence, the artist conveys a striking psychological complexity, suggesting the man’s inner self. It is this combination of technical brilliance and emotional depth that made Sebastiano’s paintings on stone so greatly admired.