From the website davidtannenberg.com, "Tannenberg's largest organ was unfortunately short-lived. On the evening of December 26, 1794, a fire broke out in the back of the church. It was thought to be put out but later that night, broke out again, this time destroying the church and its magnificent organ. It was reported that during the fire, volunteers were able to save many pipes of the organ as well the church library. Tannenberg bid on rebuilding the organ, but the project was delayed until 1811, seven years after Tannenberg's death."

From The Tracker, January 1960, Volume IV, Number 2: "The elder Tannenberg was commissioned by Zion Church to build them a complete new organ. The organ he built for Zion Church was the
'piece de resistance' to all that had been built before it. In Its day it was the largest and most
complete of all American organs. When the new organ had been inspected, the secretary of the Church wrote in his minutes:

In persuance of a request to us made, We the subscribers have examined the organ, built by David Tannenberg, placed in German Lutheran Church, called Zion Church, In the City of Philadelphia, and found the same is executed with respect to the mechanical parts in a masterly manner; That it contains all the stops and registers so contracted to be done in the articles made between the Ministers, Vestrymen and Churchwardens of the said church and the said Tannenberg, saving and excepting in two stops or registers, which he has substituted in lieu of those contracted for; which alternation in our opinion, is not to the prejudice of the instrument. That according to the contract laid before us, a set of bells were to be introduced, but they, not having yet provided by the Ministers, Vestrymen and Churchwardens, that part remains yet to be executed by Mr. Tannenberg."

signed by:
John C. Moller
M. Hillegas
Peter Kurtz
Jacob Anthony
Godfrey Wetzel

Updated through online information from T. Daniel Hancock.

Identified through online information from T. Daniel Hancock. -- Tannenberg's largest organ. Destroyed by fire in 1794. Some pipes were salvaged, and may have been reused in a new organ for the church in 1811.