3900259 Portrait of Astronomer Giuseppe Piazzi, The Astronomical Observatory "Giuseppe Piazzi", the Pisana Tower by Italian School, (18th-19th century); Palazzo dei Normanni, Palermo, Sicily, Italy; (add.info.: Giuseppe Piazzi (1746-1826): Italian Catholic priest of the Theatine order, mathematician, and astronomer. Palermo, The Royal Palace or Palazzo dei Normanni (Palace of the Normans), the Pisana Tower, The Astronomical Observatory "Giuseppe Piazzi": painting which portrays the astronomer Giuseppe Piazzi. His most famous discovery was the first dwarf planet, Ceres. Here is depicted with an allegory of the greek goddess. Palermo, Palazzo Reale o Palazzo dei Normanni, Torre Pisana, Osservatorio Astronomico "Giuseppe Piazzi": ritratto dell\'astronomo e cartografo Giuseppe Piazzi, primo scopritore del pianeta nano Cerere. Qui e raffigurato con un\'allegoria della dea greca.); Ghigo Roli; Italian, out of copyright.