Berthold Schwarz Berthold Schwarz Berthold Schwarz (sometimes spelled Schwartz), also known as Berthold the Black and "der Schwartzer", was a legendary German (or in some accounts Danish or Greek) alchemist of the late 14th century, credited with the invention of gunpowder by 15th- through 19th-century European literature. The purported period of Schwarz' activity (late 14th century) thus falls between the first reports of gunpowder in Europe (late 13th century) and the development of effective applications in artillery (mid 15th century). It is unclear whether Schwarz is a historical person. It has been suggested that he was a historical alchemist who had developed
Rudolf Schwarz (architect) Rudolf Schwarz (architect) Rudolf Schwarz (15 May 1897, Strasbourg – 3 April 1961, Cologne) was a German architect known for his work on Kirche St. Fronleichnam, Aachen. He also played a decisive role in the reconstruction of Cologne after the Second World War. After conducting Cologne's reconstruction authority between 1947 and 1952 he contributed to the rebuilding of the city with his buildings. Among them is the Wallraf-Richartz Museum (1956), which now houses the Museum of Applied Art. He also reconstructed the pilgrimage church of Saint Anne in Düren, near Aachen, which is probably his most famous work. Schwarz worked