Are you impressed with fine, inventive furniture workmanship? You will be amazed as I was as you watch, yes, I said WATCH this video of David Roentgen (German, 1743–1807) Berlin Secretary Cabinet.
It was built 1778–79. It is 11 ft. 9 3/8 in. high and can be seen in Kunstgewerbemuseum, Staatliche Museen zu Berlin. Photograph: Stefan Klonk, Berlin
Click anywhere on the picture
and you will see this the video.