Commemorative (adjective)

1. Made, issued, or intended to commemorate a person, event, or achievement.
2. Made, issued, or intended to commemorate a person, event, or achievement and to serve as a reminder of the significance of the person, event or achievement.

Origin:

From latin commemorativus, from commemorare ("to remember"), from com- ("together") + memorare ("to recall"), from memor ("mindful").

Examples:

1. The coin was a commemorative issue for the country's independence.
2. The stamp was a commemorative issue for the famous scientist.
3. The commemorative plaque was placed in honor of the soldiers who died in the war.
4. The commemorative medal was awarded to the veterans.
5. The commemorative book was published on the occasion of the company's anniversary.