Lanckorona Pact was an agreement between Polish center (PSL Piast) and right wing parties (primarily Związek Ludowo-Narodowy and Polskie Stronnictwo Chrześcijańskiej Demokracji and several smaller parties, known as the Christian Union of National Unity

Christian Union of National Unity

Christian Union of National Unity was an electoral coalition of Polish Christian Democratic for the Polish legislative election, 1922.The coalition was composed of several smaller parties:* Związek Ludowo-Narodowy...

 alliance or Chjena) on 17 May 1923 in Warsaw

Warsaw

Warsaw is the capital and largest city of Poland. It is located on the Vistula River, roughly from the Baltic Sea and from the Carpathian Mountains. Its population in 2010 was estimated at 1,716,855 residents with a greater metropolitan area of 2,631,902 residents, making Warsaw the 10th most...

.

The politicians of those parties agreed to pursue stricter polonization

Polonization

Polonization was the acquisition or imposition of elements of Polish culture, in particular, Polish language, as experienced in some historic periods by non-Polish populations of territories controlled or substantially influenced by Poland...

 policies and to increase the role of Catholic Church in the state.

The agreement led to the dimissal of the government of Władysław Sikorski and creation of the Chjeno-Piast

Chjeno-Piast

Chjeno-Piast was an unofficial name of a coalition of Polish political parties formed in 1923. It included the Polish Peasant Party "Piast" and an older coalition 1922 Christian Association of National Unity . The merger was passed during a meeting in the manor of senator L...

 coalition on 28 May, with the new government of Wincenty Witos

Wincenty Witos

Wincenty Witos was a prominent member of the Polish People's Party from 1895, and leader of its "Piast" faction from 1913. He was a member of parliament in the Galician Sejm from 1908–1914, and an envoy to Reichsrat in Vienna from 1911 to 1918...

. Former Polish chief of state, Józef Piłsudski, also resigned his governmental posts in protest.