'' During the Spanish domination there was even a period in which the only chair of mathematics at the Study of Naples (the name of University at that time) was deserted or abolished.
'' While in Naples ... were few people involved in astronomical studies, although there were times, however, who applied himself cheerfully, and ... wished and earnestly advised, that in so conspicuous and interesting city ... an Observatory also be built, and contributed effectively to the study and the progress of astronomy, provided of the necessary instruments.
''Longitude of the Observatory of Naples to the east of Paris .... 47.44,3
Mister Baron de Zach... taking an average value among the different results for the latitude of the building of the Royal Museum of Naples... found it 47'. 41", 2: applying the appropriate correction to this value, the longitude of the Observatory is 47'. 42", 5.
''...era già notte fatta, e così potei dall'alto contemplare la maestosa Napoli illuminata dalla luna e da mille e mille fanali!
Spettacolo di magia e di incanto!
— N. Legnazzi, Letter to Giovanni Santini, 5 December 1870
''...essendo nella ferma risoluzione di fare dal canto mio quanto mai potrò perché questo Osservatorio abbia degli strumenti che corrispondano alla magnificenza della fabbrica.... non sarà possibile che mi dia pace, se non giungo a provvedere l'Osservatorio di quanto di più pregevole possa oggi attenersi in fatto di strumenti.
—G. Piazzi, Correspondence Piazzi Oriani, September 1st 1818
In 1791 King Ferdinand IV of Bourbon decreed the foundation of the Observatory for the "progress and advancement of Science .... He then approved with his Sacred Signature ... that the meridian and the Observatory proposed by the Casella were built. Royal Palace 28 March 1791"