It should be colonial America. If it is a title like the title of this category it should Colonial America.
Yes, you should capitalize "About" in a title.
Yes, you should capitalize the C in Century.
No, you should not. You should only capitalize a word when it is at the start of a sentence or when it is a proper noun.
You should capitalize Colosseum when referring to the specific ancient Roman amphitheater in Rome.
Yes, you should capitalize "The Rotunda" as it is a specific place or location.
The word "colonies" is usually a common noun and is not capitalized. However, if you are talking about a specific group of colonies, it may be appropriate to capitalize the work in combination with the proper noun that makes then a reference to specific colonies.
It should not be capitalized.
no
No
No
You should capitalize "Musical Theatre" when referencing the specific genre or art form.
Yes, it is correct to capitalize "Should" if it is used in a title as it is a noun in this context.