| 10 Tuesday |  | 
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|   white | St Leo the Great, pope and doctor of the Church | Memorial | 
 | Mass of the memorial;  preface of the weekday, or of the saint. |  | 
| Cycle I  | [492] Wis 2:23-3:9; Ps 34:2-3, 16-17, 18-19; Luke 17:7-10. | 
 | Hours of the Memorial. Common of Pastors: For a Pope, or Common of Doctors of the Church Readings from the Common of Saints: [672] Sir 39:6-10 (#725.4); Ps 37:3-4, 5-6, 30-31 (#727.2); Matt 16:13-19 (#724.2). |  | 
 On this day in our Jesuit history...
 
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| 1549 | Pope Paul III dies To him the Society owes its first constitution as a religious order, the Formula of the Institute, approved on 27 September, 1540. | 
| 1551 | Xavier ends his two year mission in Japan. | 
| 1569 | Fr. Sforza Pallavicini, historian of the Council of Trent, was despite his attempts to escape the office, made a cardinal by Pope Alexander VII. | 
| 1619 | Descartes has a dream/vision/insight into a unitary universal science. Jesuit educated. | 
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