In 1718 Samuel Henzel went from Meissen to Vienna, and under the direction of a Belgian, Claude du Pasquier, established a factory of porcelain, which, in 1744, was purchased by Maria Theresa; from 1785 to 1815 some of the most artistic porcelain of Europe was produced here ; beginning with 1815 the quality of the work gradually declined until 1867, when the factory ceased to manufacture. One of the most remarkable products of Vienna was the massive incrustations of gold invented by Herold, who had been the Director at Meissen from 1721 to 1731.