Lech Kaczyński was born on June 18th, 1949 in Warsaw. He is the son of Jadwiga Kaczyńska (née Jasiewicz) and Rajmund Kaczyński, and has a twin brother, Jarosław Kaczyński, chairman of the Law and Justice party. His mother – a graduate of Polish who taught in high schools in Warsaw for several years and worked at the Institute of Literary Research – was a nurse in the Grey Ranks during World War II. His father – an engineer who worked for a design company and a lecturer at Warsaw University of Technology – was a soldier of the Polish Home Army (AK) and a participant in the Warsaw Uprising in the “Baszta” regiment (he was decorated with the Cross of Valor and the Silver Cross of Virtuti Militari).
A pupil of two high schools in Warsaw: the Joachim Lelewel High School and the 39th Polish Air Force High School in the Bielany district. In 1967 he started his studies at the Faculty of Law and Administration at the University of Warsaw. After defending his master’s thesis in 1971, he moved to Sopot to conduct research for the Labour Law Department at the University of Gdańsk under the supervision of doc. dr hab. Roman Korolec, then after his death – under the supervision of prof. dr hab. Czesław Jackowiak. In 1980 he successfully defended his doctoral dissertation in labour law entitled: Zakres swobody stron w zakresie kształtowania treści stosunku pracy (The extent of freedom of the parties in shaping the content of an employment relationship), and in 1990 - his postdoctoral dissertation entitled: Renta Socjalna (Social Pension).
In the years 1996-1997 he was a profesor nadzwyczajny [a post at a university offered to persons holding a postdoctoral degree] at the University of Gdańsk, and from 1999 on he has been a professor at the Cardinal Stefan Wyszyński University in Warsaw.