Ludwik Stanisław Dorn ([ˈludvʲik ˈdɔrn], 5 June 1954 – 7 April 2022)[1] was a Polish conservative politician, who served as Deputy Prime Minister and member of Sejm elected on 5 November 2007.

He was raised agnostic, but he converted to Roman Catholicism at the age of 51.

[4] Dorn graduated with a degree in sociology from Warsaw University in 1978.

[6] Elected a Marshal of the Sejm on 27 April 2007, with 235 votes, after Marek Jurek's resignation.

On 4 November 2011, he, along with 15 other supporters of the dismissed PiS MEP Zbigniew Ziobro,[7] left Law and Justice on ideological grounds to form a breakaway group, United Poland.