Short answers, pulled from the story.
Wolfgang Amadeus Mozart entered the Viennese lodge called Zur Wohltätigkeit on the 14th of December 1784. He received his first degree as an apprentice that winter evening.
Freemasonry provided a framework for humanist values and specific musical styles within Wolfgang Amadeus Mozart's compositions. Masonic ceremonies used songs to spread good thoughts and unity while avoiding the ornate Galant style dominant at the time. The Magic Flute overture contains dotted rhythms representing candidate admission rituals documented by Katherine Thomson.
Wolfgang Amadeus Mozart belonged to the original lodge called Zur Wohltätigkeit before it merged with others under the Freimaurerpatent decree. He later joined a group named Zur neugekrönten Hoffnung or New Crowned Hope and another lodge called True Concord headed by Ignaz von Born. Records show he attended meetings regularly until his death across these organizations.
A dotted musical figure appears three times at the start of The Magic Flute overture composed by Wolfgang Amadeus Mozart. This rhythm represents the candidate knocking three times on a door for admission into the Master Mason degree ritual. Three-part harmony emphasizes the sacred significance of the number three throughout the work.
Wolfgang Amadeus Mozart composed multiple works specifically for performance at Masonic gatherings including Die Maurerfreude and Maurerische Trauermusik in 1785. Other pieces such as Auf die feierliche Johannisloge appeared in 1772 while Zerfließet heut geliebte Brüder functioned as an opening song in 1786. The opera The Magic Flute carries strong Masonic influences throughout its story and music.