easy one

Where will you find this:
On the reverse is the inscription (in Latin):

"

CONGREGATI EX TOTO ORBE _______________ OB SCRIPTA INSIGNIA TRIBUERE

"

Translation: "The _______________ having congregated from the whole world awarded because of outstanding writings."

In the background, there is the representation of Archimedes' tomb, with the carving of his theorem on the Sphere and the Cylinder (a sphere and a circumscribed cylinder of the same height and diameter, the result of which he was most proud) behind a branch.