General:
* National treasures: This is a broad term that encompasses objects of historical, cultural, or artistic significance.
* Cultural heritage: This focuses on the intangible and tangible aspects of a country's culture, including collectibles.
* Historical artifacts: This emphasizes the historical value of the collectibles.
* National patrimony: This is a formal term that refers to the collective cultural and historical inheritance of a nation.
More specific:
* Antiquities: This refers to objects of historical and archaeological value.
* Artworks: This focuses on paintings, sculptures, and other forms of visual art.
* Collectibles: This is a general term that can encompass a wide range of objects, including stamps, coins, books, and more.
* National treasures: This focuses on the unique and significant value of these collectibles.
* Cultural relics: This term emphasizes the historical and cultural importance of these collectibles.
Ultimately, the best word to use will depend on the specific context and the type of collectibles you are discussing.