Translated:
I can carry out sculpture in marble, bronze, or clay, and also I can do in painting whatever may be done, as well as any other, be he who he may….
And if any of the above-named things seem to anyone to be impossible or not feasible, I am most ready to make the experiment in your park, or in whatever place may please your Excellency — to whom I comment myself with the utmost humility, etc.
See also the developer’s resume, da Vinci-style.