| Jurisdiction: | Suburbicarian See |
| Frascati | |
| Latin: | Tusculanus |
| Country: | Italy |
| Province: | Diocese of Rome |
| Area Km2: | 168 |
| Population: | 124,500 (est.) |
| Population As Of: | 2013 |
| Catholics: | 117,700 (est.) |
| Catholics Percent: | 94.5 |
| Parishes: | 24 |
| Denomination: | Roman Catholic |
| Rite: | Latin Rite |
| Established: | 3rd Century |
| Cathedral: | Basilica Cattedrale di San Pietro Apostolo |
| Priests: | 27 (diocesan) 20 (Religious Orders) |
| Bishop: | Tarcisio Bertone (cardinal-bishop) Raffaello Martinelli (diocesan bishop) |
| Suffragan: | for one--> |
| Archdeacon: | for one--> |
| Map: | Frascati diocesi.png |
The Diocese of Frascati (Lat.: Tusculana) is a Latin suburbicarian see of the Diocese of Rome and a diocese of the Catholic Church in Italy, based at Frascati, near Rome. The bishop of Frascati is a Cardinal Bishop; from the Latin name of the area, the bishop has also been called Bishop of Tusculum. Tusculum was destroyed in 1191. The bishopric moved from Tusculum to Frascati, a nearby town which is first mentioned in the pontificate of Pope Leo IV.[1] Until 1962, the Cardinal-Bishop was concurrently the diocesan bishop of the see. Pope John XXIII removed the Cardinal Bishops from any actual responsibility in their suburbicarian dioceses and made the title purely honorific.
Like other dioceses close to Rome, Frascati became a bishopric of choice for Cardinals of powerful papal families during the 17th century; a period known for its unabashed nepotism. Frascati Bishops of that era were significantly intertwined: