Piano Sonata No. 17 (Mozart)

{{more citations needed|date=January 2021}}

{{Infobox musical composition

| name = {{nowrap|Piano Sonata in B{{music|flat}} major}}

| subtitle = No. 17

| composer = W. A. Mozart

| image = Mozart drawing Doris Stock 1789.jpg

| image_upright =

| alt =

| caption = Drawing of Mozart in silverpoint by Dora Stock in 1789

| other_name =

| key = B-flat major

| catalogue = K. 570

| style = Classical period

| composed = {{start date|1789|02}}

| dedication =

| published =

| movements = Allegro, Adagio, Allegretto

| scoring =

| misc =

}}

{{stack|{{listen|type=music

| filename = Mozart - Piano Sonata No. 17 in B-flat major - I. Allegro.ogg

| title = I. Allegro

| description =

| filename2 = Mozart - Piano Sonata No. 17 in B-flat major - II. Adagio.ogg

| title2 = II. Adagio

| description2 =

| filename3 = Mozart - Piano Sonata No. 17 in B-flat major - III. Allegretto.ogg

| title3 = III. Allegretto

| description3 = performed by Bernd Krueger

}}}}

Wolfgang Amadeus Mozart's Piano Sonata No. 17 in B-flat major, K. 570, dated February 1789,Score at NMA is a sonata in three movements:

{{Ordered list|type=upper-roman

|Allegro in {{music|time|3|4}}

|Adagio (E-flat major) in {{music|time|4|4}}

|Allegretto in {{music|time|2|4}}

}}

A typical performance takes about 18 minutes.

There is an accompanying violin part of doubtful origin in many 1800 editions; the piano part is exactly the same as for piano solo. Neue Mozart-Ausgabe (NMA) describe it as an addition by either Johann Anton André or {{ill|Johann Mederitsch|de|WD=}}.[http://dme.mozarteum.at/DME/objs/ed/ucb20_197_-17.jpg Description at Mozarteum]