In the city where a dethroned Polish king once governed a French province and built enduring landmarks, the leaders of France and Poland will sign a treaty on Friday that could be the first formal step towards extending French nuclear deterrence over central Europe in this new era of US unreliability.
The treaty of Nancy will be signed on Europe Day, in the town hall on the 18th-century Place Stanislas, by the French president, Emmanuel Macron, and the Polish prime minister, Donald Tusk. It will cement a reconciliation between two countries that have been estranged within the EU for most of the last three decades.
