Keepsake
Part of speech: noun
Definition: Some object given by a person and retained in memory of something or someone; something kept for sentimental or nostalgic reasons. Specifically, a type of literary album popular in the nineteenth-century, containing scraps of poetry and prose, and engravings.
Souvenir
Part of speech: noun
Definition: An item of sentimental value, to remember an event or location.
Example sentence: A live show is a room full of sound and people and now you have technology where people can film it and take it away and all that is lost afterwards but they have a souvenir.