Does anyone know the origins of Marc Aurel glass please? From what I've read on the Riedel website it seems Marc Aurel is a trademark of Nachtmann, and that Nachtmann now belongs to Riedel. Was Marc Aurel always a part of Nachtmann or was it a separate company before Nachtmann acquired it? Googling for Marc Aurel brings up lots of archaelogist sites and a cafe but precious little glass.