Ivan Vladimirovitch Chtcheglov (Russian: Ива́н Влади́мирович Щегло́в; 16 January 1933 – 21 April 1998) was a French philosopher, political activist, and poet of Russian origin, best known as the ideologist of Unitary Urbanism and the author of the "Formulary for a New Urbanism", published under the pseudonym Gilles Ivain in 1953.
He and his friend Henry de Béarn planned to blow up the Eiffel Tower with some dynamite they had stolen from a nearby building site, because "its reflected light shone into their shared attic room and kept them awake at night." He was arrested at Les Cinq Billards on Rue Mouffetard in Paris and committed to a mental hospital by his wife, where he was subdued with insulin and shock therapy, and remained for 5 years. He died in 1998.