translate English to German: In his years in the Vatican , he planned an industrial use of solar power , by employing concave mirror s to heat water . While most of Leonardo's inventions were not built during his lifetime, models of many of them have been constructed with the support of IBM and are on display at the Leonardo da Vinci Museum at the Château du Clos Lucé in Amboise * .
Im Mai 1507 traf der König in Mailand ein, und bald darauf wurden Leonardos Dienste formal und gütlich von der florentinischen Signoria auf Ludwig übertragen, der ihm den Titel eines Hofmalers und ordentlichen Ingenieurs verlieh.