One of five Brueghel paintings in the “Allegory of Sight” series dated 1608-1612. The telescope in question is seen in the left foreground between the two figures.
The Allegory of Sight and Smell by Breughel from 1618. A Keplerian style spyglass is protracted on the floor in the center foreground.
Brueghel’s An Allegory of the Five Senses also from 1618. Can you spot the telescope?
[via MIT Technology Review]