In 1646 she accompanied her husband to Minster, where he was sent by Mazarin as chief envoy, and where she charmed the German diplomatists who were making the treaty of Westphalia, and was addressed as the "goddess of peace and concord."
By Article 11, diplomatists accredited to the Holy See, and papal diplomatists while in Italy, were placed on the same footing as diplomatists accredited to the Quirinal.
For some time longer the Tatars remained troublesome neighbours, capable of invading and devastating large tracts of Russian territory and of threatening even the city of Moscow, but the Horde was now broken up into independent and mutually hostile khanates, and the Moscow diplomatists could generally play off one khanate against the other, so that there was no danger of the old political domination being re-established.
The political and the commercial proposals were alike received with coldness, because the native diplomatists had aims which could not be reconciled completely with the policy of any other country, and the native merchants were afraid of foreign competition.
Such was the opinion held even by experienced diplomatists and by historians.