At L'Isle-sur-Serein, the river divides to encircle the tranquil little town and the ruins of its 15th-century chateau.
No ruins are left of the town's 15th-century chateau.
mnli hypothesis: No ruins are left of the town's 15th-century chateau. premise: At L'Isle-sur-Serein, the river divides to encircle the tranquil little town and the ruins of its 15th-century chateau.