Dorotheum, from Austria, sells on 22 December 2016 a "Flemish School, 17th century" Tower of Babel of unusual dimensions (25 by 76 cm), estimated at 4,000 to 6,000 Euro.
I could find no other examples of this composition, which may be a (large) fragment of a bigger (higher) work: the cutting off of the top of the Tower is a bit strange.
The work for sale seems, looking at both the composition and the style, to have been inspired by the works of Frans Francken, and is good enough to be by one of the lesser or later members of the clan, like Frans Francken III.
In 2008, it was for sale in Italy at Blindarte as a work by Frans Francken II with an estimate of 25,000 to 35,000 Euro, which was a bit too much. However, the current estimate seems too low, more of a come-and-get-me one, and the work should be worth about 8,000 Euro.
UPDATE: sold for 5,000 Euro only.