Ten Years Later: The Man in The Iron Mask by Alexandre Dumas Chapter 24 Page 19

A terrible cry resounded from all corners of the chamber, a painful cry uttered by the king and all present. It is given to but few men, even those whose destiny contains the strangest elements, and accidents the most wonderful, to contemplate such a spectacle similar to that which presented itself in the royal chamber at that moment. The half-closed shutters only admitted the entrance of an uncertain light passing through thick violet velvet curtains lined with silk. In this soft shade, the eyes were by degrees dilated, and every one present saw others rather with imagination than with actual sight. There could not, however, escape, in these circumstances, one of the surrounding details; and the new object which presented itself appeared as luminous as though it shone out in full sunlight.

So it happened with Louis XIV.