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The first piano was created by Bartolomeo Cristofori, seventy years before Mozart born.
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The square piano was created by Johann Christoph Zumpe
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The France revolution was started
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The square piano had been virtually replaced by the upright piano for home use
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The First World War was started when Franz Ferdinand was executed.
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The first electronic piano produced in mass was created by Leon Termen
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The invasion to Poland was started by Germany
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The magnetic resonator piano was created, this allowed the pianist to record an immediately play back, edit his performance and elicit new sounds acoustically from the piano strings, without speakers.
