Tonnerre

The County of Tonnerre was a fief of northern Burgundy centred on Tonnerre. In 1337 it was held by the Chalon family under the French crown.

John IV of Chalon sold neighbouring Auxerre to the crown in 1370. His grandson Louis II lost Tonnerre in 1414 after opposing John the Fearless; Philip the Good granted it to Arthur de Richemont, but the Treaty of Arras returned it to the Chalons in 1435. A grant making Tonnerre a duchy in 1572 was never registered, and it remained a county until the Revolution of 1789.