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Plan.echauguette.Avignon. Examinons donc ces chauguettes des murailles papales d'Avignon La fig prsente le plan d'une de ces chauguettes audessous des mchicoulis elles ne consistent qu'en deux contreforts extrieurs entre lesquels est pratiqu un talus dont nous allons reconnatre l'utilit un arc runit ces deux contreforts ViolletleDuc