Guerlain (French pronunciation: ​[ɡɛʁlɛ̃]) is a French perfume house, among the oldest in the world. It has a large customer following, and has traditionally been held in high esteem in the perfume industry. Perfumes by Guerlain are often said to be characterized by a common olfactory accord known as the "Guerlinade". A perfume by the same name was launched by Guerlain in 1921.