Jurek Lewandowski has been a towering figure of Polish and international Relativity. He graduated under the supervision of Andrej Trautman, and he worked extensively on isolated horizons and near horizon geometries, loop quantum gravity, CR structures and spacetimes, Einstein equations and the twistor equation. He is credited among the researchers who most contributed to the development of Loop Quantum Gravity, having put his skills as mathematical physicist to the service of many different aspects of the theory. He is equally cherished in the quantum gravity community as somebody who served the community by organizing many conferences and schools, that turned out of particular importance. He has also been the first and long-serving president of the Polish Relativity Society, supporting the study of Einstein's theory in Poland. He has been cherished by colleagues and students for his kind and cheerful spirit, and a unique sense of humor.

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