| Type: | Cardinal |
| Honorific Prefix: | His Eminence |
| Giovanni Battista Casali del Drago | |
| Camerlengo Emeritus of the College of Cardinals | |
| Church: | Roman Catholic Church |
| Appointed: | 15 April 1901 |
| Term End: | 9 June 1902 |
| Predecessor: | Serafino Cretoni |
| Successor: | Francesco di Paola Cassetta |
| Other Post: | Cardinal-Priest of Santa Maria della Vittoria (1899-1908) |
| Ordination: | 22 December 1860 |
| Consecration: | 8 December 1895 |
| Consecrated By: | Mariano Rampolla del Tindaro |
| Cardinal: | 18 June 1899 |
| Created Cardinal By: | Pope Leo XIII |
| Rank: | Cardinal-Priest |
| Birth Name: | Giovanni Battista Casali del Drago |
| Birth Date: | 30 January 1838 |
| Birth Place: | Rome, Papal States |
| Death Place: | Rome, Kingdom of Italy |
| Buried: | Campo Verano |
| Parents: | Raffaele Casali del Drago Carlotta Barberini Colonna |
| Previous Post: | Latin Patriarch of Constantinople (1895-99) |
| Alma Mater: | Roman Seminary |
| Coat Of Arms: | Giovanni Battista Casali del Drago stemma.svg |
Giovanni Battista Casali del Drago (30 January 1838 – 17 March 1908) was an Italian cardinal and member of the Italian noble family. He was a second cousin of the Prince del Drago.
He came from a aristocratic family[1] and was related to several cardinals including Antonio Casali, Savo Millini and Mario Millini.[2] He graduated from the Roman seminary, where he completed a doctorate in utroque iuris (civil and canon law).[3]
He was ordained a priest in 1860 and went on to become a canon of the Patriarchal Lateran Basilica and private chamberlain de numero participantium of Pope Blessed Pius IX. He later became a canon of the Patriarchal Vatican Basilica and a prelate.
On November 29, 1895, he was appointed titular Latin Patriarch of Constantinople[4] with residence in the Roman Curia. He was consecrated by Mariano Rampolla del Tindaro, the Cardinal Secretary of State of the Holy See. In June 1899 he was created cardinal-priest.[5] From 1901 to 1902 he was a Camerlengo of the Sacred College of Cardinals. He took part in the conclave of 1903.[6]
He was buried in Campo Verano.
Martin Bräuer, Handbuch der Kardinäle: 1846-2012 (Berlin/Boston: Walter de Gruyter GmbH & Co KG, 2014).