رده:سده ۲۰ (میلادی) بر پایه قاره

I don't have sufficient context provided to write an accurate overview of this category. To give you a plain-language description based only on the information available, I would need to see what articles or subcategories are actually listed under "Category:20th century by continent." Could you provide more details about what this category contains?

AI-generated from the Wikipedia summary — may contain errors.