I know that the IF sent envoy were sent to Anna to persuade her to come back She was even tempted by the Imperial crown. as we know A I and Elizaveta were childless (their 2 daughter died childless) Constantine was he heir to the throne, but even the crown didn`t prsuade her to come back. in 1815 ,after the vienna congress, constantine was appointed commaner-in chief of the Polish army and went to Warsaw. But in fact he was the ruler of the Polish Kingdom. In autumn 1815 he met Joanna Grudzinska at a ball and fallin love with her. Joanna was a polish aristocrat but the title of the princess was granted to the Grudzinskis in the 1790s . The family came from Poznan, or ,to be precise, not far from Poznan ( also known as Pozen). He started visiting her family and decided that divorce was necesary. It took 4 years to persuade the Dowager Impress to give permission to the marriage. for her, divorcr meant that a member of the IF didn`t respect the sanctity of conjugal ties. what is more, the Russians could have the same impression. the point is that during church services a priest named all the mebers of the IF and asked to pray for them,in case of divorce ANNA`s name wouldn`t be mentioned so accoding to mariya fedorovna" every russian peasant in a provincial village would doubt whether the member of the IF neglected the sanctity of conjugal ties, that would undermine the authority of the IF"9quote from memory, read it in NIKOLAY I by Shilder, published more than 100 years ago). when it became clear that ANNA wouldn`t come back mariya fedorovna agreed for the divorce under the condition that he wpould choose another German princess. but constantine persevered and finally received the permission renouncing his rights to the throne.