Wolfgang Amadeus Mozart was a prolific and influential composer of the Classical era, born in Salzburg. Mozart showed prodigious ability from his earliest childhood. He was competent on keyboard and violin by age five, and he composed from the age of five and performed before European royalty. He composed more than 600 works, many acknowledged as pinnacles of symphonic, concertante, chamber, operatic, and choral music. He is among the most enduringly popular of classical composers, and his influence is profound on subsequent Western art music. Mozart was a versatile composer, and wrote in every major genre, including symphony, opera, the solo concerto, chamber music including string quartet and string quintet, and the piano sonata.