Abstract: The subject of this research is the artworks of the Flemish painter Jan Philipp van Thielen – a prominent author of the pieces depicting flower garlands in the XVII century, but so little-known nowadays. His name is unjustly forgotten in Russian historiography, although his paintings exhibited in the national museums; although in Western historiography, his popularity has grown in recent decades. Special attention is given to the painter’s works in different genres (religion, portraits, mythology), which are framed by a flower garland accentuating and symbolizing the central images. The scientific novelty of consists in ratification of art of the once renowned and now almost forgotten painter Jan Philipp van Thielen, as well as in the proof that he was one of the most popular flower painters in Flanders, and his patrons and customers were such high-rank aristocrats as Diego Felípez de Guzmán 1st Marquess of Leganés (1580-1655), and Archduke Leopold Wilhelm of Austria (1664-1662), both art lovers and philanthropists. The acquired results demonstrate that Jan Philip van Thielen painted flower garlands in different genres. In the art of Flanders of the XVII century with remarkable success the showed the beauty of garlands and their use for enhancing the religious or moralizing meaning of the central images. His works are widely exhibited not only in museums, but also in auctions, which once again proves his important role in the painting of the XVII century.