Tower of Babel as can be seen on the second degree “adoption” tracing board.
Interestingly, the image can also be found on an image (of a tracing board) of the oldest known ‘high degree’ ritual from 1747. See here.
I also have a contemporary French 21st degree AASR tracing board with the tower on it.
Frequently reproduced. Can be found in Feddersen (Die Arbeitstafel in der Freimaurerei Band I (1982) F/34, P. 304). He gives as source Le Parfait Mácon 1744