The article presents a research study on fashion, social rivalry and identity of nobility in Polish-Lithuanian Republic in the 18th Century. Research is based on the data obtained from widely drawn up inventories of movables allows us to give a social depth to the view constructed upon iconography and literature. The number of inventories, their social representation, connection to specified social group and period enable us to look at the history of fashion and other aspects of material culture considering different social, economic and cultural realities. Registers from the 18th century draw our greatest interest because of their number, reliability and quite equal spread over time.