Important Dates and Events
| 02.12.1409 | Foundation of Leipzig University in the Monastery of St. Thomas |
| 14.09.1477 | The oldest bell "Gloriosa" is cast |
| 1482-1496 | Renovation of the nave into a late-Gothic Hall Church |
| 24.06.1519 | Service held for the opening of the Leipzig Dispute between Martin Luther and Johann Eck |
| 25.05.1539 | Martin Luther introduces the Reformation in Leipzig |
| 1541 | Dissolution of the monastery and destruction of its buildings |
| 1723-1750 | Johann Sebastian Bach is Cantor in Leipzig |
| 1732 | Renovation of the St. Thomas Church |
| 12.05.1789 | W.A. Mozart plays the organ here |
| 1806 | The church is used to store munitions by Napoleon's troops |
| 1813/1814 | The church is used as military hospital during "Battle of the Nations" |
| 04.04.1841 | Bach's St. Matthew Passion performance initiated by Felix Mendelssohn Bartholdy |
| 16.09.1842 | Foundation of the „Gustav - Adolf - Werk" |
| 23.04.1843 |
Dedication of the Bach Memorial, built through Mendelssohn's initiative |
| 26.11.1848 | Commemoration of Robert Blum in the St. Thomas Church |
| 1884-1889 | Renovation of the church to a Neo-Gothic style; building of the Sauer Organ |
| 1902 | Closing of the old St. Thomas School |
| 1904 | The Church Superintendent's House is built on the site of the St. Thomas Church |
| 1908 | Dedication of the Bach Memorial by Carl Seffner |
| 1917 | The last tower-keeper moves out of of the bell-tower apartment |
| 04.12.1943 | Tower is damaged by fire-bombs |
| 1950 | Bach's grave moved to the St. Thomas Church |
| 1961-1964 | Renovation of the interior of the church |
| 1966/1967 | Building of the Schuke Organ (deinstalled 1999) |
| 1991 | Beginning of the complete restoration of the St. Thomas Church |
| 1993 | Dedication of the Paulus Altar |
| 04.11.1997 | Installation of the Mendelssohn Window |
| 21.05.2000 | Thomas Window in the sanctuary |
| 11.06.2000 | Dedication of the restored St. Thomas Church and the new Bach Organ |
| 28.07.2000 | Celebration of the 259th anniversary of Johann Sebastian Bach's death |
| 2005 | Renovation of the Sauer Organ |
| 18.10.2008 | Dedication of the new sculptured Mendelssohn Memorial; destroyed by the Nazis in 1936 |
| 11.10.2009 | Dedication of the Peace Window |




