Born in Warsaw, Poland. In 1970, graduated in law from Warsaw University. Articled as a judge and as a barrister. In legal practice since 1973. Is mainly a criminal defence lawyer, but has also specialised in family law and in protection of personal goods and chattels. During Martial Law, acted as defence counsel at numerous political trials. Was Assistant Prosecutor in the case of the abduction and murder of Father Jerzy Popieuszko. For many years was a member of the Barristers' Council and Expert for the Mazowsze Region Branch of the Solidarity Trade Union. Lectured for articling law students and was member of the egzamination committee. Co-author of screenplays for 17 films directed by Krzysztof Kieslowski. His screenplays were translated into 10 languages and published as books. Member of the American Academy of Motion Pictures. Regular contributor to several weekly and monthly magazines. Member of Polish Senate (Higher Chamber of Polish Parliament) of for several terms. In 2002 Piesiewicz was elected leader of his party. However, since 2001 the AWS coalition and RS have played a negligible role in Polish national politics.. Screenwriting credits (alone or in collaboration) include NO END / BEZ KONCA (1985), "Dekalog" (1987-88 TV mini-series "The Ten Commandments), LA DOUBLE VIE DE VÉRONIQUE / THE DOUBLE LIFE OF VERONIQUE (1991), THREE COLORS: BLUE, WHITE & RED / TRZY KOLORY: BLEU (1993), BIALY (1994), & CZERWONY (1994), CISZA / SILENCE (2001), HEAVEN (2002), L'ENFER / HELL (2005), and NADZIEJA / HOPE (2007).  Nominated for Achievement in Writing - Best Screenplay Written Directly for the Screen 1994: RED (w. Krzysztof Kieslowski) 1 nomination