Excerpted from the Wikipedia article:
The Liver of Piacenza is a life-sized bronze model of a
sheep's liver covered in Etruscan inscriptions, measuring
126 mm by 76 mm by 60 mm and dated to the late 2nd century BC.
The liver is subdivided into sections for the purposes of performing
haruspicy; the sections are inscribed with names of individual
Etruscan deities. The Piacenza liver parallels the Babylonian artefact
[in the British Museum collection] by representing the major
anatomical features the gall bladder, caudate lobe and posterior vena
cava, of the liver as sculpted protrusions.
The outer rim of the Piacenza liver is divided into 16 sections; since
according to the testimony of Pliny and Cicero, the
Etruscan divided the heavens into 16 astrological houses, it has been
suggested that the liver is supposed to represent a model of the
cosmos, and its parts should be identified as constellations or
astrological signs. Each of the 16 houses was the
"dwelling place" of an individual deity.
I now crave a replica of the Liver, to keep on my desk, and I was
going to complain that there was no way to fulfil this desire. But I
found one on
which sounds like a joke, but isn't. The price is even reasonable.
Truly, we live in an age of marvels.