Lanckorona Pact (Polish: Pakt lanckoroński) 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 alliance or Chjena) on 17 May 1923 in Warsaw.[1]
The politicians of those parties agreed to pursue stricter polonization policies and to increase the role of Catholic Church in the state.[2]
The agreement led to the dimissal of the government of Władysław Sikorski and creation of the Chjeno-Piast coalition on 28 May, with the new government of Wincenty Witos. Former Polish chief of state, Józef Piłsudski, also resigned his governmental posts in protest.