The Eye of the Mindless Servant was created specially for a talented sculptor.
The Artisan used the lens as not only a bit of artistic flair to set himself apart, but also for a secret purpose. The Artisan used it to see through the eyes of golems he had crafted, passing them off as the beautiful statues they were and using that front to spy on the noble estates both in his home city and abroad, even on the King in his own gardens where many secrets were exchanged.
A simple monocle made up of gold and amber tinted glass. The frame shaped to fit the owner precisely.
The Eye, as it is widely now known, helped in one's concentration, seeming to allow one to focus far more easily. It's other, more notable quality was that it permitted the wearer to see through the eyes of golems that the maker had crafted at will.
Monuments Great and Small - Such as fountains, gargoyles, statues, and colossi.