The Capitoline triad is documented in Portus through sculptures.
In the museum of Ostia is a head identified as that of Zeus, found in the Isola Sacra necropolis and dated to the second century AD.
Head of Zeus from the Isola Sacra necropolis. Museo Ostiense, inv. nr. unknown. Photo: Wikimedia, Sailko. Also in the museum of Ostia is a head of Athena that somehow ended up in the tomb of Iulia Procula (tomb 106) in the Isola Sacra necropolis. It was inspired by the Greek korai from the sixth century BC, and has been dated to the late first century BC or early first century AD, so it pre-dates Portus.
Head of Athena from the tomb of Iulia Procula. H. 0.28. Museo Ostiense, inv. nr. 104. Photo: Wikimedia, Sailko. In the Museo Torlonia are a head of Jupiter, a statue of Juno and two statues of Minerva.
Head of Jupiter. H. 1.00. Museo Torlonia, inv. nr. 400.
Statue of Juno. H. 2.10. Museo Torlonia, inv. nr. 184.
Statues of Minerva. H. 2.20 and 2.12. Museo Torlonia, inv. nrs. 183 and 298.
