Proper noun
Congress Poland
(historical) The Kingdom of Poland created in 1815 by the Congress of Vienna as a sovereign state of the Russian part of Poland connected by personal union with the Russian Empire under the Constitution of the Kingdom of Poland until 1832.
After the Uprising, Congress Poland was downgraded in official usage from the "Kingdom of Poland" to the " Vistula Land " and was more fully integrated into Russia proper, but not entirely obliterated. Source: Internet
A detailed tsarist Russian census, even at the late date of 1897, showed that nearly 75% of the Jews of Congress Poland (that is, Warsaw-area ethnographic Poland) were employed in either industry or trade. Source: Internet
The German Confederation and Congress Poland are created and the neutrality of Switzerland is guaranteed. Source: Internet
In Russian Congress Poland, a striking growth of industry, railways and towns was taking place, all against the background of an extensive, but less productive agriculture. Source: Internet
Probably 75% or more of them originated from Congress Poland, with the balance coming directly from other regions such as East and West Prussia, Pomerania, Posen, Württemberg, and Galicia among others. Source: Internet
Riasonovsky p.308 In 1831 Nicholas crushed a major uprising in Congress Poland ; it would be followed by another large-scale Polish and Lithuanian revolt in 1863. Source: Internet