Johann Georg Leopold Mozart (November 14, 1719 – May 28, 1787) was a German composer, conductor, teacher, and violinist. Mozart is best known today as the father and teacher of
He was born in
While a student in Augsburg, he appeared in student theatrical productions as an actor and singer,  and became a skilled violinist and organist.  He also developed an interest, which he retained, in microscopes and telescopes.  Although his parents had planned a career for Leopold as a Catholic priest, this apparently was not Leopold's own wish. An old school friend told Wolfgang Amadeus Mozart in 1777, "Ah he [Leopold] was a great fellow. My father thought the world of him. And how he hoodwinked the clerics about becoming a priest!" 
He withdrew from the St. Salvator Lyceum after less than a year. Following a year's delay, he moved to Salzburg to resume his education, enrolling in November 1737 at the Benedictine University (now
Leopold received the degree of Bachelor of Philosophy in 1738.  However, in September 1739 he was expelled from the university for poor attendance, having "hardly attended Natural Science more than once or twice." 
In 1740, he began his career as a professional musician, becoming violinist and valet to one of the university's canons, Johann Baptist, Count of
In 1743 Leopold Mozart was appointed to a position (fourth violinist) in the musical establishment of
The question of whether Leopold was successful as a composer (either in terms of artistic success or fame) is debated. The Grove Dictionary says that as of 1756, "Mozart was already well-known. His works circulated widely in German-speaking Europe." However, biographer
Scholars agree, however, that Leopold was successful as a pedagogue. In 1755, he wrote his
Leopold discovered that his two children were musically gifted in about 1759, when he began with keyboard lessons for the seven-year-old Nannerl. The toddler Wolfgang immediately began imitating his sister, at first picking out thirds on the keyboard
 and then making rapid progress under Leopold's instruction. By 1762, the children were ready to work as concert performers, and Leopold began taking the family on extensive concert tours, performing for both aristocracy and public, throughout central and western Europe. This tour included Munich, Vienna, Presburg, Paris and the Hague together with a lengthy stay in London;
The discovery of his children's talent is considered to have been a life-transforming event for Leopold. He once referred to his son as the "miracle which God let be born in Salzburg".  Of Leopold's attitude, the Grove Dictionary says:
The recognition of this 'miracle' must have struck Leopold with the force of a divine revelation and he felt his responsibility to be not merely a father's and teacher's but a missionary's as well. 
By "missionary", the Grove Dictionary refers to the family's concert tours.
Scholars differ on whether the tours made substantial profits. To be sure, often the children performed before large audiences and took in large sums, but the expenses of travel were also very high, and no money at all was made during the various times that Leopold and the children suffered serious illnesses. Mozart biographer Maynard Solomon (1995) takes the view that the tours were lucrative and produced long-term profits for Leopold; Ruth Halliwell (1998) states to the contrary that their income generally only covered their travel and living expenses.
Since the instruction took much of his time, and the touring kept him away from Salzburg for long periods, Leopold cut down his activities in other areas. Nannerl later claimed that he "entirely gave up both violin instruction and composition in order to direct that time not claimed in service to the prince to the education of his two children."  After 1762, his compositional efforts seem to have been limited to revising his earlier work; and after 1771 he composed not at all. 
The touring continued into the early 1770s. The last three trips were to Italy, with only Leopold accompanying Wolfgang. The failure of Leopold to advance above his Vice-Kapellmeister position at Salzburg is attributed by the Grove Dictionary  to the great amount of time that the journeys kept him away from Salzburg (the longest journey was about three and a half years). After the final return from Italy in 1773, Leopold was repeatedly passed over for the Kapellmeister post.
Although Leopold is portrayed (notably by Halliwell 1998) as generally quite worried about money, the Mozart family by 1773 evidently felt prosperous enough to upgrade their living quarters. They left the home in the
Starting around this time, a major preoccupation of Leopold was the lengthy and frustrating struggle to find a professional position for his son. Leopold was widowed in 1778 when Maria Anna died in Paris while accompanying Wolfgang on a job-hunting tour.
Leopold Mozart is a controversial figure among his biographers, with the largest disagreements arising concerning his role as the parent of adult children. Mozart biographer Maynard Solomon has taken a particularly harsh view of Leopold, treating him as tyrannical, mendacious, and possessive; Ruth Halliwell adopts a far more sympathetic view, portraying his correspondence as a sensible effort to guide the life of a grossly irresponsible Wolfgang.
Wolfgang left home permanently in 1781 (see below), and from this time until 1784, Leopold lived in Salzburg with just Nannerl (now in her early thirties) and their servants. Nannerl had a number of suitors,  of whom the most important was Franz Armand d'Ippold, with whom she was evidently in love. In the end she did not marry him, and the reason for this is unknown. One possibility, frequently entertained by biographers,  is that the marriage was blocked by Leopold, who liked having Nannerl at home as the lady of the house. However, Halliwell  observes that no written evidence on this point survives and insists that we simply do not know why Nannerl married so late. Nannerl finally did marry in August 1784, at age 33. She moved to the home of her new husband, Johann Baptist Franz von Berchtold zu Sonnenburg, in the small rural town of St. Gilgen, roughly six hours journey east of Salzburg. 
During his remaining years, Leopold spent a fair amount of his time trying to help Nannerl at a distance, as her new marriage situation, involving five apparently ill-educated stepchildren, was apparently not easy. According to Halliwell, Nannerl depended on Leopold in many ways: he did "shopping [and] the engagement of servants. ... He relayed news from Salzburg, Munich, and Vienna to divert her, did his best to organize the maintenance of her
In July 1785, Nannerl came to Salzburg to give birth to her first child, a son. The infant stayed behind with Leopold when Nannerl went home, and with the assistance of his servants, Leopold raised the child. He frequently sent letters to Nannerl (at least one per week) that usually began with the sentence "Leopoldl is healthy", ("Leopoldl" is "Little Leopold") and offered a full report on the child.  Leopoldl stayed until his grandfather's death in May 1787.
Leopold apparently found raising his grandson a happy experience. Halliwell relates one repeated episode:
(As a toddler) [Leopoldl] was developing a will of his own, had to be cajoled into doing what Leopold wanted – Leopold's strategem for persuading him to go to bed was to pretend to climb into Leopoldl's bed, whereupon Leopoldl would gleefuly try to push him away and get in himself. 
Maynard Solomon suggests that in keeping his grandson in his home, Leopold may have hoped to train yet another musical prodigy. Halliwell notes a different possibility, that conditions for child-rearing in the Berchtold household were distinctly suboptimal. For further details of this episode, see
Wolfgang left home for good in 1781, when instead of returning from a stay in Vienna with his employer
As indicated by Mozart's return letters (which alone survive), Leopold was strongly opposed to the Vienna move, wanting Wolfgang to return to Salzburg. A fairly harsh family quarrel resulted. Leopold was also strongly opposed to Wolfgang's marriage to
In 1785 Leopold visited Wolfgang and Constanze in Vienna, at a time when his son's career success was at its peak. He witnessed first hand his son's success as a performer, and on February 12 heard
Later in 1785, when Leopold took in Nannerl's child, Wolfgang was not informed.  However, in the following year Wolfgang found this out from a mutual acquaintance in Vienna. At this time, Wolfgang wrote to Leopold to ask if he would be willing to take care of his own two children while he and Constanze went on concert tour. Leopold turned him down, probably with harsh words. His letter to Wolfgang does not survive, but his summary to Nannerl of it does (17 November 1786):
Today I had to answer a letter from your brother which cost me a lot of writing, so I can write very little to you ... You'll readily understand that I had to write a very emphatic letter, because he made no lesser suggestion than that I should take his 2 children into my care, since he would like to make a journey through Germany to England ... The good honest
silhouettemaker H[err] Müller had sung Leopoldl's praises to your brother, so he found out that the child is with me, which I'd never told him: so this was how the good idea occurred to him or perhaps his wife. that would certainly not be bad, – They could travel in peace, – could die, – – could stay in England, – – then I could run after them with the children etc: as for the payment he's offering me for the children, for servants and the children etc: – Basta!  my excuse is forceful and instructive, if he cares to profit from it. 
For interpretations of this letter, see Halliwell (1998, 528), which takes a viewpoint sympathetic to Leopold, and Solomon (1995, 396), which takes a viewpoint sympathetic to Wolfgang.
Starting around the time he wrote this letter and continuing through the first part of 1787, Leopold's health was failing. He had become seriously ill by April 4. On this day, Wolfgang wrote to him in alarm at the news, though he did not travel to Salzburg to see him. When Leopold died on 28 May (see below), Wolfgang was unable to attend the funeral, the travel time to Salzburg being too long. 
Little information is available on how Wolfgang took Leopold's death, but a postscript he included in a letter to his friend Gottfried von Jacquin suggests that, despite the quarrels and partial estrangement, his father's death was a blow to him: "I inform you that on returning home today I received the sad news of my most beloved father's death. You can imagine the state I am in." 
The assessment of Leopold Mozart as a person and as a father brings forth serious disagreement among scholars. The Grove Dictionary article, by
A man of broad cultural achievement ... Leopold Mozart may have been haughty, difficult to please and at times intractable, ... but there is no compelling evidence that Mozart was excessively manipulative, intolerant, autocratic or jealous of his son’s talent. On the contrary, a careful reading in context of the family letters reveals a father who cared deeply for his son but who was frequently frustrated in his greatest ambition: to secure for Wolfgang a worldly position appropriate to his genius. 
Other scholars have taken a harsher view. Solomon portrays Leopold as a man who loved his children but was unwilling to give them their independence when they reached adulthood, resulting in considerable hardship for them. Daniel Steptoe makes a similar assessment, and particularly faults Leopold for having blamed Wolfgang for his mother's early death – not just immediately the death in 1778 ("a crushing reply to a young man grieving for his mother"), but even later on in 1780. 
Robert Spaethling, who translated Mozart's letters, typically takes a position strongly sympathetic to Wolfgang in his struggles with his father; he describes Wolfgang's resignation of his Salzburg position and marriage to Constanze as a two-act "drama of liberation from Salzburg, specially Wolfgang's liberation from Leopold Mozart."