an elaborated lathe (Drehbank) was created for the emperor's personal carpentry hobby. This is the earliest extant lathe, the earliest known surviving lapidary instrument as well as one of the earliest examples of scientific and technological furniture. The earliest surviving screwdriver has also been found attached to one of his suits of armour. Regiomontanus reportedly made an eagle automaton that moved and greeted him when he came to Nuremberg. Augsburg also courted "their" emperor by building the legendary Nachttor or Night Gate (famous for its many secret mechanisms), intended to make his entrance safer if he returned to the city at night, in 1514. The gate was destroyed in 1867, but plans and descriptions remain so recently Ausburg has created a virtual version. He liked to end his festivals with fireworks. In 1506, on the surface of Lake Konstanz, on the occasion of the gathering of the Reichstag, he staged a show of firework (this was the first recorded German firework, inspired by the example of Italian princes), completed with firework music provided by singers and court trumpeters. Machiavelli judged him as extravagant, but these were not fireworks done for pleasure, peaceful celebration or religious purpose as the type often seen in Italy, but a core ritual of Maximilian's court, that demonstrated the link between pyrotechnics and military technology. The show caused a stir (the news about the event was distributed through a Briefzeitung, or "letter newspaper"), leading to fireworks becoming fashionable. In the Baroque era, it would be a common form of self-stylization for monarchs. A lot of these scientific and artistic instruments and technical marvels came from Nuremberg, by then the great mechanical, metalworking and precision industry centre of German Renaissance. From 1510, Stabius also took up permanent residence there after travelling with the emperor for years. The city's precision industry and its secondary manufacturing industries were connected to the mining industry, that the leading financiers from the neighbouring Augsburg (which had a flourishing printing industry and was also important for the emperor politically) heavily invested into in partnership with princes like Maximilian. The development in astronomy, astrology, cosmography and cartography as well as a developing economy with demand for training in book-keeping were tied with the change in status and professionalization of mathematical studies (that once stood behind medicine, jurisprudence and theology as the lowest art) in the universities. The leading figure was George Tanstetter (also the