At the 2001 census the municipality had a population of 27,132 inhabitants and a population density of 8,027.2 persons/km², making it the most densely populated comune in Italy outside the Province of Naples (although it was only seventh overall, behind Portici, Casavatore, San Giorgio a Cremano, Melito di Napoli, Naples, and Arzano).
Maria Louisa was born in Portici, in Campania, the site of the summer palace (Reggia di Portici) of her parents, King Charles, King of Naples and Sicily and Maria Amalia of Saxony.
While in Naples, he took a close interest in the archaeological discoveries at Portici and Herculaneum.
He was a curator in the Museum für Naturkunde in Berlin, where his collections of Lepidoptera, Coleoptera, Hymenoptera, Diptera are conserved.His collections of Agromyzidae are shared between MfN and the Agricultural School at Portici now part of the University of Naples Federico II.
She was orphaned at the age of 4 and thereafter was raised in boarding schools operated by the Sacred Heart in Portici and Paris.