The original has a signature on the left front rock. This was destroyed by force.
On the various copies of metal from the 19th century, the signature is indeed recognizable, but also crossed out.
There is no signature on the painting by Baron Francois Gerard and the engraving by Paolo Toschi.
The area on which the signage can be seen in the metal reliefs does not exist in these versions.
See point "Differences".
Enlargement of the front part of the inscription / signature
Enlargement of the rear part of the inscription / signature