Emphasizing Importance & Value:
* Monuments: Our Past, Our Present, Our Future.
* Preserve the Past, Inspire the Future.
* Monuments: A Legacy Worth Protecting.
* History Lives in Stone, Let's Keep it Standing.
* Every Monument Tells a Story, Let's Hear It.
Highlighting Preservation:
* Save Our Monuments, Save Our Heritage.
* Time is Running Out, Save Our Landmarks.
* Protecting Our Past, Building Our Future.
* Conserve, Restore, Preserve.
* Monuments: Treasures to Treasure.
Appealing to Action:
* Join the Movement to Save Our Monuments.
* Lend a Hand, Save a Landmark.
* Make a Difference, Preserve History.
* Every Action Counts, Save Our Heritage.
* Be a Guardian of Our Past.
Evoking Emotion:
* Monuments: A Window to Our Soul.
* Don't Let History Fade Away.
* Remember the Past, Protect the Future.
* Our Heritage, Our Identity.
* For Future Generations, Save Our Monuments.
Specific to Certain Types of Monuments:
* Save Our Ancient Ruins, Witness to Time.
* Protect Our War Memorials, Honor Our Heroes.
* Preserve Our Architectural Gems, A Legacy of Beauty.
* Keep Our Cultural Landmarks Alive.
Bonus Tip: Keep your slogans concise, memorable, and impactful!