In the seventeenth century, new forms of depicting people appeared in Italian painting. These were small format works, often in series, representing saints, philosophers, or ordinary characters from daily life. The emphasis in such images was on portrait features, the reflection of characters and emotions. On the canvas, the artist depicts a grey-bearded man, his gaze directed upwards. Perhaps, this is a saint who looks up to heaven with reverence, worthy of emulation in virtue and faith. The artist was especially attentive in reproducing the realistic features of the saint's face. The portrait is a part of the "Philosophers" series. The stylistic ease and psychological nuances highlight the temperamental style of Luca Giordano.