The Republic of Cospaia
HistoryComments
What if the omission was intentional? Perhaps both parties preferred a neutral buffer zone to avoid constant border skirmishes in that specific region.
Did any other contemporary state formally recognize their sovereignty, or was it just an uncontested territory that neither side bothered to claim?
Was there really no government? If they managed land and tobacco trade, someone was calling the shots. Can you actually call it a sovereign state with zero administration?
This reminds me of Bir Tawil, though that is a more modern geopolitical quirk. It is heartening to see a historical example where a mistake led to centuries of peaceful coexistence rather than a border war.
It is important to view Cospaia through the lens of the 16th century Papal States tobacco monopoly. Their sovereignty was less about political independence and more about a convenient loophole for the illicit trade of the crop.
The 1441 treaty between the Republic of Florence and the Papacy is the culprit here. The boundary description simply omitted the strip of land, creating a legal vacuum that lasted until 1826.