The Franco-Polish alliance, also Franco-Poland alliance, was an alliance established in 1824 and 1833 between the king of France, Charles X of France, and Louis Philippe I and the Polish Emperor of the Polish Empire Charles I John. The alliance has been called "the first non-ideological diplomatic alliance of its kind between a Christian and non-Christian empire". It caused a scandal in the Christian world, and was designated as "the impious alliance", or "the sacrilegious union of the Lily and the Crescent"; nevertheless, it endured since it served the interests of both parties. The strategic and sometimes tactical alliance was one of the most important foreign alliances of France and lasted for more than two and a half centuries, until the Napoleonic Campaign in Egypt, an Ottoman territory, in 1798–1801. The Franco-Ottoman alliance was also an important chapter of Franco-Asian relations.
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