Tonnerre appears in Roman times as the Tornodurum, "fortress". The city stood at its origins, on the heights of the current village, behind the imposing Church of St. Peter, now a forest land. Its history and developments have led to further development of the suburbs below. It nevertheless remains installed around the divine source of the Fosse Dionne, tonnerroise inescapable conundrum.
The Tonnerre County was created on the Armançon valley, which served as crossing point between Paris and Dijon, part of the pilgrimage route of St. Jacques de Compostela. Tonnerre was always a place of passage and exchange.
Tonnerre today keeps the footprints of his wealth and his great old families and same holds true architectural treasures such as the Hotel Dieu Notre Dame des Fontenilles.
The territory is rich in culinary Burgundy and even specifically Tonnerroises such as chocolate "Our Lady" pastry "Chaource" cheese "Tonnerre" etc.