- "A most Magnificent tower, His great grand-daughter fashioned, To surveil her subjects and the heavens, 'Twixt Sun and Earth encaged in iron."
- ―A riddle by Nostradamus describing the Medici Tower.[src]
Interested in predicting the future and a patron of the seer Nostradamus, Catherine allowed the astrologer Cosimo Ruggieri to use the tower to observe the sky from the iron enclosure on top. Following the destruction of the palace in the 1760s, the tower was left as the only remnant, standing next to the Halle aux Blés.