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Louis Emanuel Jean Guy de Savoie-Carignan de Soissons CVO RA FRIBA (1890–1962) was the younger son of Charles de Savoie-Carignan , Count de Soissons (with claimed descent, through an illegitimate son, from Thomas Francis of Savoy, Prince of Carignano). An architect, he was professionally known as Louis de Soissons.