After the death of Alexander, the Dubrovitsy Estate was inherited by his son Matvey. Count Matvey Alexandrovich Dmitriev-Mamonov (1790-1863) was one of the most noble and wealthy people in Russia. Matvey took part in the Patriotic War of 1812 and in the foreign campaign of the Russian army in 1813-1814. In 1816, when Matvey was about 26 years old, he moved from Moscow to Dubrovitsy and became a recluse there.