Still under construction, but already worthwhile visiting is a new German site in regards to Fuerstenberg (Fürstenberg) porcelain from Germany. The company was founded in 1747 – and is still operating - by Karl I Duke of Braunschweig. Follow the link to the excellent back stamp site, which includes many examples:
The site is an ambitious project by a private collector, specialising in early 18th century pieces – well done.