Florin Mitroi's oeuvre is predominantly characterized by series of stylized portraits, usually renditions of head and torso, depicting individuals with strong black brush strokes in rigid positions. Other aspects of his work comprise ink drawings on paper—mostly nude studies with a mythological underline—as well as symbolic and figurative zinc plates produced in the last years of his life.

Florin Mitroi (1938–2002) is an intriguing figure in the Romanian art scene. He was a passionate teacher—he taught at “Nicolae Grigorescu” Institute of Fine Arts in Bucharest for more than 30 years—but a reserved individual. His role in the arts school was well known by the local scene, but few knew his art too—he had only one solo exhibition during his lifetime, in 1993 in Bucharest. Only after his death and the discovery of numerous works in his studio, did his prolific production became apparent, with more than 8,000 graphic works, drawings, engravings, paintings, and carved objects in metal.