A period of 500 years is called a quincentennial.
While "quincentennial" is the most direct and accurate answer, it's also worth noting other contexts related to 500 years:
- Anniversary: A quincentennial is the 500th anniversary of an event. For example, the quincentennial of Leonardo da Vinci's death was in 2019.
- Half a Millennium: While not a formal term, "half a millennium" can also be used to refer to a period of 500 years.
- Historical Period: Depending on the specific historical context, a 500-year period might fall within a larger named era (e.g., the Renaissance). However, it wouldn't have a single, universally accepted name other than quincentennial.
Therefore, the most precise and commonly accepted term is "quincentennial."
