Short answers, pulled from the story.
Wolfgang Amadeus Mozart wrote the Concerto for Flute, Harp, and Orchestra in April 1778. He composed the majority of this work at Joseph Legros home while staying in Paris.
Adrien-Louis de Bonnières, duc de Guînes commissioned the piece as a flutist who wanted music for his own use. His eldest daughter Marie-Louise-Philippine also played the harp and took composition lessons from Mozart.
Mozart refused partial payment because the housekeeper offered only half the expected amount instead of the full fee. The duke never paid Mozart the six Louis d'or owed for his tutoring services to Marie-Louise-Philippine.
Mozart composed the majority of this work at Joseph Legros home where he had keyboard access. Some sections may have been written at Mozart second apartment on rue du Gros Chenet during their Paris stay.
The concerto contains three movements including an Allegro opening section, an Andantino middle movement, and a final Rondeau movement. Each movement features solo flute and solo harp sharing prominence throughout all three parts.