Small fragment of porfido rosso, also known as porphyry. The color is deep reddish-purple, with white and black inclusions. The thickness of the sample is an even 1 cm throughout a...

Unknown Roman, Porphyry vessel with bearded masks (ca. late 1st century B.C.‒early 2nd century A.D.)

Porphyry, 10 1/16 × 11 13/16 × 9 3/4 in...

Fragmentary porphyry head of a bearded man

Porphyry, Imperial, Roman...

Roman workshop, Laurel and oak wreath frame holding a red porphyry roundel (first half of 19th century)

Gilt bronze and Red porphyry, 38 cm diameter...

Sarcophagus of Constantia (detail)

Detail of the front of the red-porphyry sarcophagus of Constantia Augusta, later St. Constance, daughter of the Emperor Constantine the Great. The front, like the three other sides...

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