 That year, Anna acquired an estate on the banks of Aare River and gave it the name of "Elfenau".She spent the rest of her life there, and, as a lover of music, made her home not only a center for domestic and foreign musical society of the era but also the point of reunion of diplomats from different countries who were in Bern.Finally, on 20 March 1820, after 19 years of separation, her marriage was officially annulled by a manifesto of Emperor Alexander I of Russia.