Imperial portraiture of the Tetrarchs depicts the four emperors together and looking nearly identical. The portraiture symbolizes the concept of co-rule and cohesiveness instead of the power of the individual. The idea of the Tetrarchy, which is apparent in their portraits, is based on the ideal of four men working together to establish peace and stability throughout the empire.

The medium of the famous porphyry sculpture of the Tetrarchs, originally from the city of Constantinople, represents the permanence of the emperors. Furthermore, the two pairs of rulers—a Caesar and an Augustus with arms around each other— form a solid, stable block that reinforces the stability the Tetrarchy brought to the Roman Empire.

Stylistically, this portrait of the Tetrarchs is done in Late Antique style, which uses a distinct squat, formless bodies, square heads, and stylized clothing clearly seen in all four men. The Tetrarchs have almost no body. As opposed to Classical sculptures, which acknowledge the body beneath the attire, the clothes of the Tetrarchs form their bodies into chunky rectangles. Details such as the cuirass (breastplate), skirt, armour, and cloak are highly stylized and based on simple shapes and the repetition of lines. Despite the culmination of this artistic style, the rendering of the Tetrarchs in this manner seems to fit the connotations of Tetrarch rule and the need for stability throughout the empire.