| Type: | Bishop |
| Honorific-Prefix: | Most Reverend |
| Giambattista Isnardi de Castello | |
| Bishop of Mondovi | |
| Church: | Catholic Church |
| Diocese: | Diocese of Mondovì |
| Term: | 1697–1732 |
| Predecessor: | Domenico Trucchi |
| Successor: | Carlo Felice Sanmartino |
| Ordination: | 30 May 1677 |
| Consecration: | 1 September 1697 |
| Consecrated By: | Bandino Panciatici |
| Birth Date: | 28 June 1651 |
| Birth Place: | Turin, Italy |
| Death Date: | August 1732 (age 81) |
| Death Place: | Mondovì, Italy |
| Nationality: | Italian |
Giambattista Isnardi de Castello (28 June 1651 – August 1732) was a Roman Catholic prelate who served as Bishop of Mondovi (1697–1732).[1] [2] [3]
Giambattista Isnardi de Castello was born in Turin, Italy on 28 June 1651.[4] He was ordained a deacon on 23 May 1677 and ordained a priest on 30 May 1677. On 26 August 1697, he was appointed during the papacy of Pope Innocent XII as Bishop of Mondovi. On 1 September 1697, he was consecrated bishop by Bandino Panciatici, Cardinal-Priest of San Pancrazio, with Prospero Bottini, Titular Archbishop of Myra, and Matteo Gagliani, Bishop of Fondi, serving as co-consecrators. He served as Bishop of Mondovi until his death in August 1732.