Manufacturer of "Polish sashes" founded in the small town of the same name on the estate of Duke Radziwill by two Armenianas, Jan Mazarski and his son Leon. The area at that time was part of the Polish-Lithuanian Commonwealth, and is now Belarus. The sashes carried the woven inscriptions "Sluck" or "Me Fecit Sluciae". Some sashes made after 1780 bore the inscription in Cyrillic script, "W Gradie Sluckie" at one end, and "Leo Mazarskij" at the other. For more information, see Hali #84, "Symbols of Nationality: The History of the Polish Sash" by Maria Taszycka & Manfred Holst.