Each image is under Digital image courtesy of Getty’s Open Content Program.
Coin of Athens: https://www.getty.edu/art/collection/object/109KKJ?altImage=779dd5f1-3eaa-4a7b-b012-e912c3e4ee8c
Tremissis of Constans II: https://www.getty.edu/art/collection/object/103Z1K?altImage=bd357751-b171-4094-9be5-835b7b0eecf0
Coin: https://www.getty.edu/art/collection/object/103XKJ