Palazzo Fondi, 18th-century palace in Naples, Italy.

Palazzo Fondi, formerly Palazzo Genzano, stands on Via Medina in Naples. Its smooth ashlar base with mezzanine supports two upper orders of windows: the piano nobile has balconies on corbels topped by triangular pediments on paired Ionic half-columns, while the top floor has stucco-framed balconies. A marble balustrade marks the central balcony, and a corbelled cornice runs beneath a roofline balustrade.

The palace was originally built for Marquis Gian Giacomo de Marinis and later underwent modifications under Prince Giuseppe Sansevero di Sangro in 1799 and 1824. These changes shaped its current appearance and reveal different architectural phases in its development.

The palace's picture collection came from the De Marinis, Gaetani and Sansevero families; the Princes of Fondi kept it here after the 1824 remodelling. The building is now divided into apartments, and restoration began in 2024 ahead of its planned use as the seat of AGCOM.

Palazzo Fondi stands on Via Medina in central Naples, near the city's administrative and commercial streets. The building is divided into apartments, and restoration work began in 2024 ahead of its planned use as the seat of AGCOM, Italy's communications authority. Access to the interior is therefore tied to that redevelopment rather than to regular visits.

The courtyard's 18th-century staircase by Luigi Vanvitelli leads to upper floors frescoed in the same period, and the entrance hall carries the De Marinis coat of arms. The palace was divided into apartments before restoration work began in 2024 ahead of its planned use as the seat of AGCOM.