The drawing below is from Gustave Eiffel's book describing the tower that bears his name. There are 53 of them in total.
XXV. Assembly of the lower part. Pylons and scaffolding
This plate was made by the Bureau of Methods, like all those in this chapter. She shows how the Eiffel Tower will be assembled from the ground up to the first floor. It shows the central scaffolding, scaffolding piles, and patterns associated with them.
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