The brewery in Mordy was founded by Jan Zembrzuski, a justice of the peace. The date of establishment was initially given as 1877, and after 1912 (after the Przewłocki family took over the property) as 1878. Probably one of these dates could have been the date of commencement of construction of the plant. The year 1869 also appears... this could indicate that Zembrzuski was erecting the brewery on the site of an earlier plant. In fact, the newly built brewery was opened in early June or July 1879. The brewery was modernly equipped, and in one of the press releases it was presented as a steam brewery. In July 1879, Kurier Warszawski reported "... a beer brewery was opened, with equipment that could in the not too distant future meet not only all the requirements of the improving technical art." It should be added that Jan Zembrzuski, when building the new brewery from scratch, had over twenty years of experience behind him - he had previously worked in major foreign breweries. In the initial period, the plant employed 9 workers and its turnover amounted to 25,000 rubles. At the beginning of the century, it began to reach 30,000 rubles and employment increased to 15 workers. The production volume at the turn of the century was about 20,000 buckets. From the beginning of its operation, the brewery focused on brewing Bavarian beer. In 1885, this beer appeared in Warsaw. The exclusive right to sell it in Warsaw was granted to the TSCHOEPE and sp. Department Store located at the corner of Marszałkowska and Widok streets. Already then, beer from the brewery in Mordy was bottled in bottles of "own form", which had the company's logo on the metal caps, corks and in the glass - the letters J. Z., which was to guarantee the quality of the product. At the beginning of the 1890s, the brewery was managed by Józef Jaworski. In 1910, T. K. Wańskowski was mentioned as the brewery manager, at that time 28,000 buckets of Bavarian beer were brewed. In 1912, another change took place - the Przewłocki family became the new owners of the brewery and palace in Mordy. Konstanty Przewłocki bought the estate from Jan II Zembrzuski for his son Henryk. Henryk Przewłocki lived from 1884 to 1946. He died on June 12 in a POW camp in Borowicze in the USSR. Zygmunt Boenisch became the new manager of the brewery - he had previously run breweries in Warsaw on Ceglana Street and in Żerań. The second manager was Karol Prokopiak.