Green Old Paris Porcelain Vase

Old Paris is a beautiful porcelain style that was created between the mid 1700's through the late 1800's. It's very distinctive in style and most often is a thing of great beauty. This is a very beautiful one with a gorgeous country scene and green painted above the sky that I picked up from eBay a few years ago. I am, to this day, in love with this piece. I need to learn more about Old Paris so I can try and judge the exact time period and region of origin.