Lettrism is a French avant-garde movement, established in 1946 by the publication of the Lettrist Manifesto by Isidore Isou in Paris.
Lettrism is also the Hurufi movement (Arabic: حروفية meaning "letters") which was lead by Fażlu l-Lāh Astar-Ābādī, also called Nāimī (1340–1394) and which spread in areas of western Persia, Anatolia and Azerbaijan.
Also see Hurufiyah or Huruffiya
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