Propozycja.

After 1837 all voivodeships that constituted the Kingdom of Poland were turned into gubernias and became an integral part of Russian administrative division, ruled directly by the Russian tsars.
https://en.wikipedia.org/wiki/Vistula_Land
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Gubernie Kraju Nadwiślańskiego (1905)
Gubernia radomska Радомская губерния Radomhttps://pl.wikipedia.org/wiki/Kraj_Nadwiślański


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Another name is governorate

Tver Governorate (Russian: Тверская губерния, Tverskaya guberniya) was an administrative division (a guberniya) of the Russian Empire and Russian SFSR, which existed from 1796 until 1929. Its seat was in Tver,
https://wikivividly.com/wiki/Tver_Governorate

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Radom Governorate (Russian: Радомская Губерния, Polish: Gubernia radomska) was a governorate of the Congress Poland.

History
It was created in 1844 from the merger of the Sandomierz Governorate with Kielce Governorate. Its capital was in Radom (previously a capital of the Sandomierz Governorate).

It was divided into 8 powiats: Kielce, Miechów, Olkusz, Opatów, Opoczno, Radom and Sandomierz.

In 1866 the Kielce Governorate was once again made an independent entity, and thus split off from the Radom Governorate.

https://en.wikipedia.org/wiki/Radom_Governorate