1568

The Freiherren (barons) von Poschinger trace their origins back to an old patrician family from Lower Bavaria, where they are mentioned from 1399 on.
On 15th July 1568, Joachim Poschinger acquired the property of Zwieselau, in Frauenau, on which a glass manufacture already stood. As Philipp Apian writes in the Bayerische Landtafeln (Bavarian landscapes); this manufacture was situated next to the river Kleiner Regen. It soon had the reputation for blowing the best glass and making the best mirror glass in the country.
One century later, Franz Poschinger built the manor of Oberfrauenau.

His diary, in which he noted all interesting events concerning the glassworks, is a document of inestimable historical importance.

1785

1785: the property was made a 'judicial district', which gave the owners the right of simple jurisdiction over the enterprises in their district, provided that they belonged to the Bavarian nobility.

1790

1790: things were settled; the family was raised to the nobility and given the title of Barons von Poschinger. The prosperity of the glassworks was exemplary.

1805

In 1805, the von Poschinger manufacture comprised four glassworks and a workshop specialised in polishing mirror glass. A lot of wood was used: several mills were built during this period.

1879

In 1879, the Emperor of Germany bestowed the hereditary title of Reichsrat (Councillor of the Reich) upon Georg Benedikt von Poschinger. This office allowed him and his descendants to achieve a great deal for the district, which he represented in the Upper House of the Empire.

Thus, he initiated the construction of the railway line that connects Platting to Bayerisch Eisenstein. He contributed a large part of his land and a significant sum of money to the construction of the section of the railway between Zwiesel and Grafenau.