With the ascent to the throne of Robert, King of Naples, in 1309, the castle, which he renovated and expanded, became a remarkable center of culture, because to his patronage and his passion for the arts and literature: the Castel Nuovo hosted important personalities of the culture of the time, such as the writers Petrarch and Giovanni Boccaccio in their Neapolitan stays, while the most famous painters of the time that they were called to paint its walls: Pietro Cavallini, Montano d'Arezzo, and above all Giotto, who in 1332 painted the Palatine Chapel.