private practice in Warsaw. In 1904, he became head of the Department of Neurology at the Szpital Starozakonnych w Warszawie, which he led for 28 years. There, many of the Polish neurologists were making their first steps. His pupil Eufemiusz Herman recalls: "Traditionally on Mondays, patient cases were reviewed. At the bedside of each patient, Flatau discussed their cases, he listened to the voice of everyone, even the youngest doctor ... As a teacher and a boss, he was deeply attached to each and every one who worked with him. They could draw richly from his great experience and extensive knowledge. He was patient, forgiving, always cheerful, treating students as their beloved family. Thinking forehead, deep dark eyes with a keen, yet warm gaze, low voice with a wide range of modulation – these are the features which, apart from the deep knowledge and great experience, attracted and charmed anyone who was in the circle of his indefatigable activity." In 1908, he lived on the Marszałkowska 150 Street in Warsaw on the first floor of the House of Fashion of Boguslaw Herse. He also lived for some time in the apartment on Chmielna Street 60. Other stories associated with Flatau and his Warsaw traces can be found in the articles of Jerzy Kasprzycki Social activities Beginning of neurology in Poland By 1899, Flatau had established a name for himself both in Germany and abroad, and returned to Poland during that year. Flatau was closely associated with attempts to re-establish Polish science during and after Russian occupation. After his return, he formed a private microscopy laboratory at his apartments in Warsaw, and worked in Warsaw hospitals as a consultant. In 1911, he established a neurological laboratory in the Warsaw Psychologic Society, and he became in 1913 the first head of the Department of Neurobiology of the Warsaw Scientific Society (Warszawskie Towarzystwo Naukowe) and from 1911 to 1923, head of the Department of Neurobiology at the Nencki Institute of Experimental Biology. For many years, he shared his responsibilities as experimentator and neurologist between the laboratory and the hospital. He was influential in establishing Polish medical periodicals Neurologia Polska and Warszawskie Czasopismo Lekarskie. Especially at the beginning of his career, he was involved in popular science activities in Poland. He published in popular medicine journals such as Zdrowie, Gazeta Lekarska, and Nowiny Lekarskie. Flatau's law, originally published in German, was reprinted in Polish