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On the sign:
RENE DUNAN (1793-1885)
1ER DIRECTEUR SOURD DE LECOLE DES SOURDS SITUEE 1 RUE CREBILLON RECONNUE LE 20 DECEMBRE 1824
René Dunan (1793-1885) born in Nantes, French pedagogue. He focused on studying people with hearing impairments, and at the end of 1824 he established the first school in France for the hearing impaired in this place.