At the address Getreidegasse 9, 5020 Salzburg Austria, very long time ago the one of the most famous composers was born- Mozart. In this house he was born, but he lived on the other bank of the river. Now here's a Mozart museum where on the 3 floors the things and the history of this great person are presented.
Website: the Mozart museum (now the website is closed, so this information is for 2019 year). It is opened daily from 9 until 17:30, in July and August from 8:30 until 19.00. Tickets for adults - 18 euros, teenagers 6 euros, children - 3,50 euros.
I haven't been to this museum myself yet, so the information is from the website.