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.
In what republic did the szlachta lose their legal privileges. 
Second Polish Republic
The legal privileges of the szlachta were legally abolished in the Second Polish Republic by the March Constitution of 1921.
the szlachta