A 'discovery' in the astronomy section of the http://www.technoseum.de in Mannheim: the transits of Venus 1761/69 in a colorized(!) diagram in the book "Die Bestimmung der denkwürdigen Durchgänge der Venus durch die Sonne ..." by G. F. Kordenbusch of 1769 - will come back to that picture next year when the last ToV for over a century arrives.