Georg Nikolaus von Nissen, (sometimes Nicolaus or Nicolai; born January 22, 1761 in Haderslev/Denmark, died March 24, 1826 in Salzburg) was a diplomat and writer. January 22 is the 22nd day of the year in the Gregorian Calendar. ... Events January 16 - British capture Pondicherry, India from the French. ... Haderslev (German Hadersleben) is a municipality in south Denmark, in the county of South Jutland on the peninsula of Jutland. ... The Kingdom of Denmark is geographically the smallest Nordic country and is part of the European Union. ... March 24 is the 83rd day of the year in the Gregorian Calendar (84th in Leap years). ... 1826 was a common year starting on Sunday (see link for calendar). ... This page is for the city of Salzburg. ... This page is about negotiations; for the board game, see Diplomacy (game). ... Though anyone who creates a written work may be called a writer, the term is usually reserved for those who write creatively or professionally, or those who have written in many different forms. ...

Nissen is known most as a biographer of Wolfgang Amadeus Mozart, whose widow Constanze he had married in 1809. From 1812 to 1820, the couple lived at Lavendelstræde 1 in Copenhagen, where many houses from the late 18th century have been preserved. The biography was published posthumously, in 1828, titled Biographie W. A. Mozart's. Nach Originalbriefen, Sammlungen alles über ihn Geschriebenen, mit vielen neuen Beylagen, Steindrücken, Musikblättern und einem Facsimile. W.A. Mozart at the age of 21 W.A. Mozart at the age of 34 Wolfgang Amadeus Mozart (January 27, 1756 – December 5, 1791) is considered one of the greatest composers of European classical music. ... Alternate uses: see widow (typesetting). ... Wolfgang Amadeus Mozart Wolfgang Amadeus Mozart (January 27, 1756 – December 5, 1791) was one of the most significant and influential of all composers of Western classical music. ... 1809 was a common year starting on Sunday (see link for calendar). ... 1812 was a leap year starting on Wednesday (see link for calendar). ... 1820 was a leap year starting on Saturday (see link for calendar). ... City nickname: none Location in Denmark Area  - Total  - Water 526 km² xxx km² xx% Population  - City ( 2004)  - Metropolitan  - Density 502,204 1,116,979 954/km² [including water] xxx/km² [land only] Time zone Eastern: UTC+1 Latitude Longitude 55°43 N 12°34 W Copenhagen ( Danish: København) is... 1828 was a leap year starting on Tuesday (see link for calendar). ...

Nissen's biography of Mozart

In his biography, Nissen attempted to achieve a compromise between Nmeek's and Schlichtegroll's point of view. He attempted to document everything that had been written about Mozart so far and to deliver an accurate description of Mozart's life based on primary sources, namely the letters of the Mozart family. Also, he had a direct witness as a source, his wife Constanze Mozart, who commited Mozart's inheritance to him.

Nissen deserves credit most of all for his efforts to collect all documents concerning Mozart, starting with the Mozart family's letters and including commemorative coins and monuments. Admittedly, he treated the written sources rather generously and edited some passages, especially from Mozart's letters. However, he did so not to deform Mozart's image, but because of "biographical respect". In the foreword to his biography he explains:

There is a need for a lot of selection to extract something attractive and characteristic in the letters, which can be offered to the public, without harming the fame and the esteem of the name-human. ... One desires not to, one must not show one's hero publicly in the way in which he portrayed himself in evenings of familiarity. By all truth, one can harm his fame, his esteem, and the impression of his works.

Later biographers often attempted to revert Nissen's "biographic respect", not because of disrespect for Mozart, but for the sake of authenticity.