The Farnese Hall, on the second floor, was rebuilt in 1665 by Cardinal Girolamo Farnese: it was previously known as "Royal Hall", and here was crowned Charles V in 1530, as King of Italy with the Iron Crown (the imperial coronation instead took place in the Basilica of San Petronio).
Anticamente era chiamata "sala regia" probabilmente poiché nella attigua "Cappella del Legato" venne incoronato Re d'Italia, con la Corona ferrea, Carlo V del Sacro Romano Impero nel 1530 (la successiva incoronazione imperiale si tenne nella Basilica di San Petronio).