The AJ Chairs are a series of chairs designed by Danish architect and designer Arne Jacobsen, one of the most influential figures in 20th-century modern design. Jacobsen's work is characterised by its minimalist aesthetics, organic forms, and functionalism. The AJ series, in particular, includes some of his most iconic designs, such as the Ant Chair, the Series 7 Chair, the Lily Chair, and the Drop Chair.