Monument

A monument is a type of—usually three-dimensional—structure that was explicitly created to commemorate a person or event, or which has become relevant to a social group as a part of their remembrance of historic times or cultural heritage, due to its artistic, historical, political, technical or architectural importance. Examples of monuments include statues, (war) memorials, historical buildings, archeological sites, and cultural assets. If there is a public interest in its preservation, a monument can for example be listed as a UNESCO World Heritage Site.

Etymology
The origin of the word "monument" comes from the Greek mnemosynon and the Latin moneo, monere, which means 'to remind', 'to advise' or 'to warn', suggesting a monument allows us to see the past thus helping us visualize what is to come in the future. In English the word "monumental" is often used in reference to something of extraordinary size and power, as in monumental sculpture, but also to mean simply anything made to commemorate the dead, as a funerary monument or other example of funerary art.
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https://en.wikipedia.org/wiki/Monument