memento

noun

Etymology: Borrowed from Latin mementō (“remember”), imperative form of meminī (“to remember”).

1. A keepsake; an object kept as a reminder of a place or event.

   “I kept the shell as a memento of my visit to the seashore.”

   “In conclusion, I would remark that the great railway stations of London deserve to be visited every whit as much as St. Paul's Cathedral, the Abbey, or the Tower, and they are as worthy a memento of this century as those buildings are of the days that are gone.”