Home / Music / What key is Tchaikovsky's Piano Concerto No. 1 in, and what key is its famous opening theme?Music linernotes album music tchaikovskyWhat key is Tchaikovsky's Piano Concerto No. 1 in, and what key is its famous opening theme?The concerto is in B-flat minor, Op. 23, but its famous opening theme is in D-flat major. Search Amazon As an Amazon Associate I earn from qualifying purchases.Related NotesExploreExploreExplorePrevious What key is Tchaikovsky's Symphony No. 1 in?Next What is unusual about the orchestration of Mozart's Piano Concerto No. 23?