The stamp was later replaced by Tiffany’s initials, which is one way collectors are able to determine the approximate date that a Tiffany Favrile lamp or other glass item was made.
The musician turned entrepreneur is known for his relaxed management style in usually conservative Japan and he's made a name for himself as a big spending art collector.
Even as an avid art collector, King Frances I probably never imagined the museum the Louvre would become, or that it would be shutdown more than four centuries later because of a disease pandemic.