Treaty of Tsarskoye Selo
... that after a Duke of Holstein-Gottorp became a Russian emperor, his wife and son traded away his ancestral lands in the Treaty of Tsarskoye Selo?
... that after a <a href="./Duke_of_Holstein-Gottorp" id="mwAQA" rel="mw:WikiLink" title="Duke of Holstein-Gottorp">Duke of Holstein-Gottorp</a> became a <a href="./Peter_III_of_Russia" id="mwAQE" rel="mw:WikiLink" title="Peter III of Russia">Russian emperor</a>, his <a href="./Catherine_the_Great" id="mwAQI" rel="mw:WikiLink" title="Catherine the Great">wife</a> and <a href="./Paul_I_of_Russia" id="mwAQM" rel="mw:WikiLink" title="Paul I of Russia">son</a> traded away his ancestral lands in the <b id="mwAQQ"><a href="./Treaty_of_Tsarskoye_Selo" id="mwAQU" rel="mw:WikiLink" title="Treaty of Tsarskoye Selo">Treaty of Tsarskoye Selo</a></b>?