| 19 March 1931 |
Beginning of the Little Flower Brotherhood |
| 2 February 1938 |
First Profession of the first two members |
| 27 December 1945 |
Re-organisation as a Clerical Congregation |
| 08 October 1947 |
Approbation of the Constitution of the Congregation by Mar Augustine Kandathil |
| 01 June 1948 |
Beginning of the Petit Seminary at Mookkannoor |
| 01 June 1956 |
First ordination to Priesthood in the Congregation |
| 12 March 1961 |
Blessing of the Major Seminary at Alwaye |
| 1969 |
Launching of the North Indian Mission |
| 1970 |
The Mission in Gorakhpur |
| 1973 |
The Mission in Punjab |
| 17 May 1925 |
Bifurcation into seperate Congregations as CST Brothers and CST Fathers |
| 08 December 1978 |
The Mission in Rajastan |
| 1982 |
The Holy See entrusts the new Diocese of Gorakhpur to the Congregation |
| 1984 |
Re-organisation of the administration into two Regions |
| 1992 |
The Mission in Nepal |
| 1994 |
Two Provinces and two Mission Regions |
| 21 December 1995 |
Raising of the Congregation to the Pontificial status |
| 1998 |
The Mission in Africa |
| 2001 |
Two Provinces and two Vice-Provinces |
