Poul Henningsen (9 September 1894 – 31 January 1967), commonly known as PH, was a legendary Danish designer, architect, writer and cultural critic. He is one of the pioneers of Nordic modern design and the master of lighting design.

He studied architecture, carpentry and masonry in his early years, combining professional theory and practical craftsmanship. From the 1920s onward, he maintained a lifelong collaboration with the Danish brand Louis Poulsen. He invented the iconic three-shade system, pursuing glare-free, soft and balanced light and believing that a lamp should be beautiful whether it is on or off.

His masterpieces include the PH5 Lamp and PH Artichoke Lamp, which remain global design classics and shape the reputation of Danish lighting design worldwide. Besides lighting, he also designed pianos, furniture and architectural interiors. As an influential cultural figure in Denmark between the two World Wars, he also devoted himself to literature, theatre and social criticism.