What term describes an object kept as a reminder of a person, place, or event?

The term that describes an object kept as a reminder of a person, place, or event is "souvenir." A souvenir is specifically intended to serve as a physical reminder or keepsake of a memorable experience, such as a trip or a significant occasion. Souvenirs often reflect the culture or history of a place and are commonly purchased or collected by individuals to evoke memories or emotions associated with particular experiences.

While the other terms, such as "memory," "token," and "artifact," relate to remembrance or significance in some way, they do not specifically denote items kept for the purpose of memory in the same direct manner as souvenirs. A memory refers to a mental recollection rather than a physical object, a token can represent a broader range of meanings including symbols of goodwill or trust, and an artifact generally refers to an object of historical or cultural interest, often studied for its significance rather than kept as a personal memento.