axis
軸 — NOMISMA
One of five ways of putting the material in order.
Aegina Sea Turtle StaterCirca 600–500 BC
Aureus of AugustusBC 27–AD 14
SolidusAD 312–
Chronological order (parts and chapters), cross-cutting themes, connections between people, actual coins, research methods — the same material can be followed from any of these five arrangements. ⚠ There are not five sets of materials. A single set of material has five coordinates.