What peace terms did Klemens von Metternich offer Napoleon in 1813?

In 1813, Klemens von Metternich sought to mediate a peace settlement to prevent the total destruction of Napoleon’s power, which he feared would leave Europe at the mercy of Russia.1

The most significant peace offer occurred on November 9, 1813, at Frankfurt. With the reluctant approval of Russia and Prussia, Metternich proposed that France retain its "natural frontiers"—defined as the Rhine, the Alps, and the Pyrenees. This proposal required prompt acceptance, as the allies did not intend to delay military operations. Although Napoleon’s foreign minister, Armand, marquis de Caulaincourt, eventually signaled assent on December 2, the allies had already withdrawn the offer by that time.2

Earlier in the summer of 1813, Metternich had also attempted to negotiate a settlement, but those efforts were frustrated by Napoleon’s obstinacy. Following the failure of these diplomatic overtures, Austria formally declared war on France in August 1813.1