Short answers, pulled from the story.
Mozart's birthplace is located at No. 9 Getreidegasse in Salzburg, Austria. The building rose from the earth during the 12th century on ground that once belonged to a garden held by Benedictine monks of St Peter's Abbey.
Wolfgang Amadeus entered this world on the 27th of January 1756 within these walls. Leopold Mozart rented the apartment on the third floor after marrying Anna Maria Pertl on the 21st of November 1747.
Otto Keutzel appears as an owner in records dating back to 1408. Chunrad Fröschmoser served as court apothecary and purchased the property in 1585.
The museum displays Mozart's childhood violin, a harpsichord used to compose The Magic Flute, portraits, documents, and early editions of his music. An incomplete portrait painted by Joseph Lange appears here as well since Lange was Mozart's brother-in-law who created this striking image in 1789.
The family lived there until 1773 when they moved to more spacious quarters in the Tanzmeisterhaus. They resided in the building from 1756 through their grand tour between 1763 and 1766 while Leopold maintained constant contact through letters with his landlord.