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Basilique Notre-Dame de Beaune
A magnificent stained glass window. But I have no idea how old it is. May be old, but my uneducated guess would say quite recent. -
Château de Chambord
The centre of the spiral staircase has a lantern at the top. -
Bayeux Cathedral
Plenty of old windows in the cathedral as well... These are from 1260, showing the local bishops Exupère and Loup.