A sesquicentennial marks the 150th anniversary of an event, often celebrated with various festivities and commemorations. The term combines the Latin prefix "sesqui," meaning one and a half, with "centennial," which refers to a 100-year period. This milestone is significant for communities, organizations, and nations, as it reflects on history and achievements over a century and a half. Many cities and institutions celebrate their sesquicentennial with parades, exhibitions, and educational programs. For example, the United States has observed sesquicentennials for key events like the Civil War and the founding of important cities. These celebrations often aim to engage the public and foster a sense of pride in heritage.