Pipe Organs
Placed in the gallery above the main entrance, it is a great tool of Tuscan organ school of the nineteenth century. It was built by Nicomedes Agati and brothers in 1845. It has two keyboards of 56 keys and range of C1-G5 with division Bassi/Soprani between D#3 and E3 notes. Pedalboard, with extension C1- E2, is made of 25 pedals (24 notes plus terzamano) and is constantly coupled to the manual. The stops are driven by levers placed in three columns to the right and left of the keyboard, according to the following setup:
| II keyboard | I keyboard | I keyboard |
|---|---|---|
| left | right I column | right II column |
| Principale 8' bassi | Clarone bassi 4' | Principale 16' bassi |
| Principale 8' soprani | Oboe soprani | Principale 16' soprani |
| Ottava 4 bassi | Corno di Bassetto | Principale 8' bassi |
| Ottava 4 soprani | Corno Inglese soprani | Principale 8' soprani |
| Decimaquinta | Flauto in XII | Principale II bassi |
| Decimanona | Flauto Traverso soprani | Principale II soprani |
| Una fila di pieno (XXII) | Viola 4' bassi | Ottava bassi |
| Due file di Pieno (XXVI e XXIX) | Corno Dolce soprani | Ottava soprani |
| Viola Gamba bassi | Flauto in ottava bassi | Duodecima |
| Violino soprani | Flauto in ottava soprani | Decimaquinta |
| Voce corale | Voce umana soprani | Decimanona |
| Flauto soprani 4' | Bordone 8' bassi | Una fila di Ripieno (XXII) |
| Concerto violini | Bordone 8' soprani | Una fila di Ripieno (XXVI) |
| Flagioletto bassi | Ripieno tre file | |
| Ottavino soprani | Cornetto soprani | |
| Trombone 8' al pedale | Nazardo soprani | |
| Bombarda 16' al pedale | Fagotto 8' bassi | |
| Basso armonico 8' al pedale | Tromba 8' soprani | |
| Basso armonico 4' al pedale | Contrabbassi al pedale | |
| Timballi ai pedali |
Pedaletti at the right of the pedalboard for Ripieno e Polisire (I keyboard)
Pedaletti at the left of the pedalboard for Ripieno (II keyboard) e Uccelliera
Pedaletti at the front for Tremolo, Unione tastiere, Espressione II tastiera