Jacob Franquart or Jacob Franckaert the Younger (1582/83 – 6 January 1651 (buried)) was a Flemish architect, painter, print artist, draftsman, military engineer and poet. He is known for his altarpieces and publications on contemporary Italian architecture. He was employed by the court of the Archdukes Albert and Isabella in Brussels as a painter and architect. He was responsible for the design of ephemeral decorations and structure for important occasions at the court such as funerals. As an architect and decorator, he introduced the Baroque in the buildings of the Habsburg Netherlands. His style is sometimes referred to as the Italo-Flemish style and became very popular in Flanders in the 17th century. Only a few paintings are attributed to him.