- 1769 September 25 - Purchase of Lots 131 and 132
- 1770 December 16 - Formal Organization of German Lutheran Congregation. Constitution Signed Log Church in use.
- 1774 March 22 - Purchase of Lot 221 for Schoolhouse
- 1786 of 1788 (?) - First Bell, Cast in England or Scotland
- 1795 - Construction of Present Church Begun
- 1801 March 31 - Theatrical Company Devotes Proceeds Of Production to Church
- 1803 - Adam Arnold, Schoolmaster, first Person in U.S. to Publish Music for a Lutheran Hymnal.
- 1806 January 27 - Incorporation Plan Adopted by Congregation
- 1806 - Congregation Chartered by State of Maryland as St. John's Evangelical Lutheran Congregation
- 1815 January 30 - Death of Rev. Solomon Schaeffer. Buried Beneath Floor of Church
- 1820 October 22 - General Synod, Parent organization of LOCA, Founded at St. John's
- 1824 November 5 - Money ($106) Received for Broken Bell Put Out in Interest
- 1825 July 4 - Rev. Karts Authorized to Order New Bell from Paul Revere Co.
- 1833 - Pew-renting System Adopted
- 1836 March - Purchase of Three Lots on Mulberry and Baltimore Streets for new Cemetery
- 1836 April 18 - Hose Company Given Permission to Build Engine House on the Church
- 1839 January 1 - Council Meetings To Be Hold on First Monday of Every Month
- 1839 January 8 - Primary Department Organized
- 1842 August 1 - Preaching in German Limited to Sunday Afternoons with Only a Few Exceptions
- 1847 January 21 - New Parsonage Authorized
- 1861 March 4 - Permission Granted City to Sink Cistern under Sidewalk for Use of Fire Company
- 1862 September - Bell Tower Used as Observation Post Prior to Battle of Antietam
- 1867 September 2 - Council Members to Sit on Gallery and Keep Boys Quiet During Services
- 1869 August 2 - Certificates of Dismission Given to Those Members Withdrawing to Form Trinity Lutheran Church
- 1869 August 2 - Resignation of Pastor T.T. Titus
- 1869 November 25 - Arrival of the Rev. Dr. Stephen Owen as New Pastor
- 1870 February 7 - Bell Committee Authorized to Purchase Two Bells from Jones & Co., Troy, N.Y.
- 1870 April 4 - First Hose Co. Asked to Remove Its Building from Area way near Tower
- 1870 June 1 - Remodeling Commenced
- 1870 June 6 - Council Approval for Furnace in Remodeled Building to Replace Stoves
- 1871 April 10 - Purchase of Spittoons Authorized
- 1871 April 16 - Dedication of Remodeled Church
- 1871 November - Withdrawal of German-speaking Members to Form St. Matthew's
- 1871 December 19 - Purchase of Thermometer for Church
- 1886 May 3 - Iron Fence Ordered to Replace Picket Fence
- 1900 April 1 - Dedication of "Rabboni" Window
- 1907 May 23 (?) - Dr. Owen Elected President of General Synod of Lutheran Church in America
- 1909 May 12 - Council Approval for Wiring of Church for Electricity
- 1916 April 16 - Death of Pastor Owen
- 1917 January 28 - Installation of the Rev. J. Edward Harms
- 1921 November 9 - Cornerstone Laying for Sunday School Building
- 1922 November 19 - Dedication of Sunday School Building
- 1945 August 26 - Community Service to Mark Close of World War II Held in Sunday School Auditorium
- 1946 March 17 - Lenten Preaching Mission Opened by Dr. Peter Marshall
- 1949 - Church Safe Robbed
- 1950 May 31 - Retirement of Pastor Harms
- 1951 June 3 - Commissioning of Miss Dorothy Auxt as First Missionary Nurse to Japan
- 1959 September 20-21 - Remodeled Parish Education Building Dedicated
- 1959 October 18 - First Church Elevator Placed in Service
- 1963 July 25 - Purchase of Ramaciotti Property (Lot 220) for South Parking Lot
- 1969 April 20 - Prince of Peace Chapel Dedicated
- 1969 May 20 - Sue Gardenhour Hired as Parish Secretary
- 1969 July 20 - FIRE!! Lightning Strikes!
- 1970 April 12 - Rededication of the Restored Church
- 1970 May 3 - St. John's Honored as a Landmark Church
- 1975 - December Return of Sue Gardenhour as Parish Secretary After Hiatus of Three Years
- 1986 November 23 - Ordination of Eleanor Smith Doub
- 1987 February 1 - Installation of the Rev. Eleanor Doub as the First Associate Pastor and First Woman Pastor of St. John's
- 1989 January 2 - Election of Judy Bauroth, First Woman of Council President
- 1994 March 27 - Ordination of Victor Slayman, a Son of the Congregation.
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