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Dates: 1186 - 1203 (Dates are approximate. ) 

Le Chastelain de Couci (modern French Le Chatelain de Coucy) was a French trouvere of the twelfth century. He has been tentatively identified as Guy de Couci who was castellan of Château de Coucy from 1186 to 1203. Some 26 songs are attributed to him, only 15 of which are considered to be authentic.