Definition: Bicentenaries are anniversaries that mark significant events in history, often leading to a celebration or commemoration of those events. These events can range from historical milestones like the invention of printing or the establishment of a new country, to modern celebrations marking the centenary of technological advancements or political revolutions.
For example:
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18th Century - 19th Century:
Celebrations could include the opening of the first steam-powered ship, the signing of the Treaty of Versailles,