Saint Thomas of Aquinus with his book Summa theologiae Fra Angelico (1400-1455)

The composition presents a figure framed within a shallow arch, evoking a sense of reverence and containment. The individual is depicted in what appears to be a monastic habit, dark blue with a white undershirt visible at the neck and sleeves. A prominent halo encircles his head, immediately signaling sanctity or elevated spiritual status.
He holds open a large book, positioned centrally within the composition. The pages are rendered with meticulous detail, suggesting importance and perhaps alluding to the written word as a source of divine knowledge. The book’s size relative to the figure emphasizes its significance. A star-shaped emblem is visible on the chest area of the habit, likely representing a symbolic element related to his identity or patronage.
The artist employed a restrained palette; earth tones dominate, with the blue and white of the habit providing contrast. The face exhibits a solemn expression, conveying seriousness and intellectual depth. Light falls upon the figure from an unseen source, highlighting the features and creating subtle modeling that gives form and volume.
The background is minimal, consisting primarily of muted browns and ochres, which serve to focus attention on the central figure. A faint cross is discernible in the upper right corner, reinforcing a Christian context. The overall effect is one of quiet dignity and intellectual authority, suggesting a personage deeply engaged with theological study and contemplation. The simplicity of the setting contributes to an atmosphere of austerity and devotion.