The Proseuticum a supplicatory poem of Conrad Celtis

to the divine Frederick the Third

for the Apollonian Laurel

A woodcut emblem depicts a bird, likely a goldfinch, facing a chalice or cup, connected by a curved, yoke-like structure.

The handwritten annotations at the bottom read "Hain 4839" and "GW 6467," which are standard bibliographic references for incunabula.