Kazimierz Marcinkiewicz, Polish physicist and politician, 12th Prime Minister of Poland

Kazimierz Marcinkiewicz (Polish pronunciation: [kaˈʑimjɛʂ martɕiŋˈkʲɛvitʂ] (listen); born 20 December 1959) is a Polish conservative politician who served as Prime Minister of Poland from 31 October 2005 to 14 July 2006. He was a member of the Law and Justice party (Prawo i Sprawiedliwość, PiS).