Question: What dissolved the privileges of the birth empire of Alexey Brodovitch, the kingdom acquiring some Thuringian territory or Habsburg Monarchy?

Knowledge 1: Alexey Brodovitch
Alexey Brodovitch was born in Ogolichi, Russian Empire (now Belarus) to a wealthy family in 1898. His father, Vyacheslav or Cheslau Brodovitch, was a respected physician, psychiatrist and huntsman. His mother was an amateur painter. During the Russo-Japanese War, his family moved to Moscow, where his father worked in a hospital for Japanese prisoners. Alexey was sent to study at the Prince Tenisheff School, a prestigious institution in Saint Petersburg, with the intentions of eventually enrolling in the Imperial Art Academy. He had no formal training in art through his childhood, but often sketched noble profiles in the audience at concerts in the city. [SEP] Knowledge 2: Thuringia
Some reordering of the Thuringian states occurred during the German Mediatisation from 1795 to 1814, and the territory was included within the Napoleonic Confederation of the Rhine organized in 1806. The 1815 Congress of Vienna confirmed these changes and the Thuringian states' inclusion in the German Confederation; the Kingdom of Prussia also acquired some Thuringian territory and administered it within the Province of Saxony. The Thuringian duchies which became part of the German Empire in 1871 during the Prussian-led unification of Germany were Saxe-Weimar-Eisenach, Saxe-Meiningen, Saxe-Altenburg, Saxe-Coburg-Gotha, Schwarzburg-Sondershausen, Schwarzburg-Rudolstadt and the two principalities of Reuss Elder Line and Reuss Younger Line. In 1920, after World War I, these small states merged into one state, called Thuringia; only Saxe-Coburg voted to join Bavaria instead. Weimar became the new capital of Thuringia. The coat of arms of this new state was simpler than they had been previously. [SEP] Knowledge 3: Szlachta
The sovereignty of szlachta was ended in 1795 by Partitions of Poland, and until 1918 their legal status was dependent on policies of the Russian Empire, the Kingdom of Prussia or the Habsburg Monarchy.
Knowledge 1: Alexey Brodovitch
Alexey Brodovitch was born in Ogolichi, Russian Empire (now Belarus) to a wealthy family in 1898. His father, Vyacheslav or Cheslau Brodovitch, was a respected physician, psychiatrist and huntsman. His mother was an amateur painter. During the Russo-Japanese War, his family moved to Moscow, where his father worked in a hospital for Japanese prisoners. Alexey was sent to study at the Prince Tenisheff School, a prestigious institution in Saint Petersburg, with the intentions of eventually enrolling in the Imperial Art Academy. He had no formal training in art through his childhood, but often sketched noble profiles in the audience at concerts in the city. [SEP] Knowledge 2: Thuringia
Some reordering of the Thuringian states occurred during the German Mediatisation from 1795 to 1814, and the territory was included within the Napoleonic Confederation of the Rhine organized in 1806. The 1815 Congress of Vienna confirmed these changes and the Thuringian states' inclusion in the German Confederation; the Kingdom of Prussia also acquired some Thuringian territory and administered it within the Province of Saxony. The Thuringian duchies which became part of the German Empire in 1871 during the Prussian-led unification of Germany were Saxe-Weimar-Eisenach, Saxe-Meiningen, Saxe-Altenburg, Saxe-Coburg-Gotha, Schwarzburg-Sondershausen, Schwarzburg-Rudolstadt and the two principalities of Reuss Elder Line and Reuss Younger Line. In 1920, after World War I, these small states merged into one state, called Thuringia; only Saxe-Coburg voted to join Bavaria instead. Weimar became the new capital of Thuringia. The coat of arms of this new state was simpler than they had been previously. [SEP] Knowledge 3: Szlachta
During the Partitions of Poland from 1772 to 1795, its members began to lose these legal privileges and social status. From that point until 1918, the legal status of the nobility was essentially dependent upon the policies of the three partitioning powers: the Russian Empire, the Kingdom of Prussia, and the Habsburg Monarchy. The legal privileges of the szlachta were legally abolished in the Second Polish Republic by the March Constitution of 1921.
Knowledge 1: Thuringia
Some reordering of the Thuringian states occurred during the German Mediatisation from 1795 to 1814, and the territory was included within the Napoleonic Confederation of the Rhine organized in 1806. The 1815 Congress of Vienna confirmed these changes and the Thuringian states' inclusion in the German Confederation; the Kingdom of Prussia also acquired some Thuringian territory and administered it within the Province of Saxony. The Thuringian duchies which became part of the German Empire in 1871 during the Prussian-led unification of Germany were Saxe-Weimar-Eisenach, Saxe-Meiningen, Saxe-Altenburg, Saxe-Coburg-Gotha, Schwarzburg-Sondershausen, Schwarzburg-Rudolstadt and the two principalities of Reuss Elder Line and Reuss Younger Line. In 1920, after World War I, these small states merged into one state, called Thuringia; only Saxe-Coburg voted to join Bavaria instead. Weimar became the new capital of Thuringia. The coat of arms of this new state was simpler than they had been previously. [SEP] Knowledge 2: Szlachta
The sovereignty of szlachta was ended in 1795 by Partitions of Poland, and until 1918 their legal status was dependent on policies of the Russian Empire, the Kingdom of Prussia or the Habsburg Monarchy. [SEP] Knowledge 3: Alexey Brodovitch
Alexey Brodovitch was born in Ogolichi, Russian Empire (now Belarus) to a wealthy family in 1898. His father, Vyacheslav or Cheslau Brodovitch, was a respected physician, psychiatrist and huntsman. His mother was an amateur painter. During the Russo-Japanese War, his family moved to Moscow, where his father worked in a hospital for Japanese prisoners. Alexey was sent to study at the Prince Tenisheff School, a prestigious institution in Saint Petersburg, with the intentions of eventually enrolling in the Imperial Art Academy. He had no formal training in art through his childhood, but often sketched noble profiles in the audience at concerts in the city.

Answer: March Constitution of Poland