Professor Ireneusz Wierzejewski was born in 1881. He completed his medical university training in 1908 in Munich. He obtained his doctor degree in 1909 in Lipsk, based on the work "Ueber den kongenitalen ulnadefekt" On the 01.07.1909, thanks to professor Lange's support, he got a permanent post in Berlin - Brandenburgische Kruppel - Heil und Erziehunganstalt, run by Konrad Biesalski. Here he performed the duties of the first assistant in the Institute and director of the orthopedic outpatient department until 15.09.1911. During this period I. Wierzejewski's professional personality formed: he had the chance to become acquainted with the specifics of his supervisors orthopedic thinking and he got to know basic surgical techniques in orthopedics. He was the first Polish professor in orthopedics to set up the first Polish Orthopedic Institute (in Poznan) modeled after Berlin Brandenburgische Kruppel - Heil und Erziehunganstalt. The organization and equipment was similar to K-H-E. This institution was later transformed into the first Polish orthopedic clinic. Just as in the German model, the Orthopedic Institute in Poznan had orthopedic workshops, which at the time was very unique in Poland. Indoctrinated with K. Biesalski idea of caring for the cripples in Germany, he strived to make it a reality in Poland. In his speeches during scientific congresses fought for an act analogous to the Prussian one from 06.05.1920. The time spent working in K. Biesalski's Institute formed the professional and scientific personality of Poland's first professor in orthopedics and indirectly but definitely influenced the creation of Poland's first Orthopedic Clinic.