The mosaic floor panel represents an oval armillary sphere, surrounded by garlands of flowers, based on drawings made by Ignazio Stern, a German painter. The paving work began with the oval motif containing the armillary sphere and the strip of winding acanthus. Ignazio Stern was later commissioned to produce the garland of flowers, on 15th July 1745. This was not the small model designed originally by Luigi Vanvitelli, but a larger one with a blue background for which Stern received an extra 20 scudi. The painter received a total of 25 scudi.
The group of mosaicists working on the pavement was made up of Guglielmo Paleat, Nicola Onofri and Giuseppe Ottaviani, with Enrico Enuo in charge and responsible for distributing wages