El Greco's composition follows the standard type used across other Cretan versions of this subject with little variation, but he made one striking innovation: he painted in two distinct artistic idioms within the same work^[1]. The small inset icon of the Virgin Hodegetria, showing Mary gesturing toward her son as the path of salvation, is rendered entirely in the late-Byzantine pictorial conventions common to Cretan icon painters, its execution so accomplished that one scholar has called it, without exaggeration, one of the finest of its era^[1]. By contrast, Luke's own figure, his agitated drapery and the weightlessly hovering angel above him are handled with a more modelled, naturalistic, Western sense of three-dimensional space, foreshadowing the direction El Greco's art would take once he left Crete for Venice^[1].

The icon survives with heavy wear across its surface, damage caused not by neglect but by generations of worshippers touching and kissing the image of the saint, direct physical evidence of its long working life as an object of genuine devotion rather than simply a display piece^[1]. An open box of pigments rests on the stool between the legs of Luke's easel, underscoring the moment being depicted as an act of craft as much as of piety, while the angel descending in a loosely wrapped green tunic acknowledges the saint's creative achievement by crowning him with laurel^[1].

Luke's legendary status as the first person to paint a true portrait of the Virgin and Christ Child has roots in Byzantine tradition, and though it was a popular subject for Cretan icon painters generally, only a small handful of surviving fifteenth and sixteenth-century Cretan works actually depict it^[1]. The small size of the panel suggests it may have been a private commission, possibly connected to the confraternity of painters in Candia, which had adopted Luke as its patron saint, though the exact circumstances of its creation remain unknown^[1]. Because Luke served as the patron saint of painters, images of the Evangelist at his easel carried an inherent charge of self-reference for any artist who painted them; one influential scholar has argued that such pictures of Luke as painter should be read as close to a figurative, if not literal, self-portrait of the artist who made them^[1].