Early New High German
Later in 1748, a grammar manual by Johann Christoph Gottsched, "Grundlegung einer deutschen Sprachkunst", was key in the development of German writing and standardization of the language. Similarly to Luther, Gottsched based his manual off the Central German variant of the Upper Saxon area. Over the course of the mid-18th century and onward, a written standard then began to emerge and be widely accepted in German-speaking areas, thus ending the period of Early New High German.