Mohammad Sabet-Eqlidi said the paintings were found on the walls of a Sassanian-era tomb in the ancient city of Gour, also known as Firuzabad, IRNA reported.
The discovery was made during the first phase of archaeological excavations in the city, which also uncovered architectural remains and evidence of two tombs.
Sabet- Eqlidi said the paintings, which experts believe date back to the early 3rd century AD, depict faces in profile and three-quarter view.
The paintings were created using mineral pigments on a gypsum base, Sabet- Eqlidi added
Firuzabad, also known as Ardeshir Khurra, is an ancient city located 125 kilometers southeast of Shiraz, the capital of Fars province. The city was founded in the early 3rd century AD by order of Ardeshir Babakan, the founder of the Sassanian Empire.