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I don't have specific context provided about what "1556" refers to. To write an accurate overview based only on reliable information, could you clarify whether you're asking about a historical year, an event, a work of art, a book, or something else entirely?
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Article
The world in 1556 January 23: Shaanxi earthquake, devastation kills 830,000 people in China.
Year 1556 (MDLVI) was a leap year starting on Wednesday of the Julian calendar.