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Tchaikovsky only wrote one violin concerto: Violin Concerto in D Major.
Barber Violin Concerto was created in 1988.
Adams Violin Concerto was created in 1995.
Brahms's violin concerto was written by Brahms. The clue is in its name: the 'Brahms' violin concerto.
look it up on google, improvisation like a Classical Concerto Cadenza