| 1835 |
First Mass celebrated in Lebanon by Fr. O'Reilly. |
| 1856 |
Storage building at 10 Parkhurst Street was purchased and converted into a chapel for the 15 Catholic families of Lebanon. |
| 1876 |
Establishment of Sacred Heart Parish in Lebanon for about 100 families. |
| 1879 |
Blessing of the first parish church on School Street. |
| 1889 |
Opening of first Sacred Heart School on Granite Street near West Street. This school was staffed by lay teachers for about 100 students and closed in 1900. |
| 1901 |
Building of Holy Redeemer Chapel in West Lebanon as a mission of Sacred Heart. |
| 1909 |
Opening of Sacred Heart School on Eldridge Street and the arrival of the Sisters of Mercy who staffed this school. |
|
| 1932 |
School enrollment jumps to 407. |
| 1932 |
New convent is built on Hanover Street (present SAU administration building). |
| 1942 |
Dedication for New Sacred Heart Church and rectory on High Street. |
| 1971 |
Sacred Heart School is closed. |
| 1976 |
Parish celebrates 100th Anniversary. |
| 1979 |
Sacred Heart Parish is entrusted to the pastoral care of the Missionaries of Our Lady of La Salette. |
| 1985 |
Bethany House is purchased for offices for Religious Education. |
| 1992 |
Sacred Heart Church celebrates 50th Anniversary. |
| 2003 |
Merging of Holy Redeemer Parish in West Lebanon with Sacred Heart Parish. |
| 2004 |
Sacred Heart celebrates 25th Anniversary of La Salette Ministry. |
