This image shows a Villeroy & Boch "Blue Castle" porcelain plate. 

• Manufacturer: Villeroy & Boch, specifically from their Mettlach factory. 

• Pattern: Blue Castle, featuring romantic landscape scenes with castles in blue transferware. 

• Material: Vitro-porcelain (Vetro-porcelain), a durable, fine china material similar to porcelain. 

• Markings: The backstamp indicates "Mettlacher Kupferstich-Unterglasurdekor seit 1809" (Mettlach copper engraving underglaze decoration since 1809), "Made in Germany," and "Blue Castle"