A very large museum with many mosaics and some sculpture, including a splendid sarcophagus. When I visited the place for the last time, parts of the museum were closed because it was moving to another location in a different part of the city. There's a room with Assyrian objects and there are medieval finds, but most of it is Hellenistic and especially Roman.
It may be noted that the museum was built on the place where the Crusaders made their famous sortie from besieged Antioch.
There are 39 items in Antioch, Museum:
Seleucia in Pieria, Coin with Zeus' thunderbolt
Seleucia in Pieria, Statue of Lucius Verus
Seleucia in Pieria, Mosaic of Eros and Psyche
Seleucia in Pieria, Statue of a seated orator
Seleucia in Pieria, Statue of the Orontes
Seleucia in Pieria, Weight of half a mina (horse)
Seleucia in Pieria, Weight (prow)
Seleucia in Pieria, Weight (bull)
Mosaic of the Alpheius river god
Seleucia in Pieria, Mosaic of the athlete Nikostratos
Tarsus, Mosaic of Orpheus
Tarsus, Mosaic of Tryphe and Bios (luxury and life)