PROPER NAMES APART

[Mary Bright]

This is the question which I'm constantly bothered about. If I have a proper name, e.g. the Black Castle, and then I use only concrete one in the text, e.g. the Castle, should I write it with a capital letter, like it goes with the Black? Here's some sentences for you:

The Black Castle is a good example of medieval architecture. The castle was founded in 1560 by the Black Prince. The rooms of the Castle/ castle were richly decorated with carving, sculpturing and painting. The Castle/ castle library numbered 50 000 books and was considered one of the richest libraries of that time.

It'd be really great if someone could tell very definitely how to use capitals in this case, if possible.

And one more question.

By 1658 one could count twelve halls in the Palace: the Royal Hall, the Prince Hall, the Marble Hall and others.

Should I always use the noun with the adjective or can I drop it out like this?

By 1658 one could count twelve halls in the Palace: the Royal, the Prince, the Marble and other halls.

Thank you very much for your help

[5jj]

The Black Castle is a good example of medieval architecture. The castle was founded built* in 1560 by the Black Prince. The rooms of the Castle castle were richly decorated with carvings, sculpturinges and paintings. The Castle castle library numbered 50 000 books, and was considered one of the richest libraries of that time.

*or: Work on the castle was started in 1560...

Use capitals only in the name.

By 1658 one could count twelve halls in the Palace: the Royal Hall, the Prince Hall, the Marble Hall and others.

By 1658 one could count twelve halls in the Palace: the Royal, the Prince, the Marble and other halls.Your second version is fine.

Your second version is fine.

[Mary Bright]

Thanks a lot for your answers and corrections.The only thing I'd like to specify is

The rooms of the castle were richly decorated with carvings, sculptures and paintings.

Would you, please, explain what was wrong about the words I used?

The rooms of the castle were richly decorated with carving, sculpturing and painting.

What I meant is the complex of decorative features which are made by means of carving, modelling and painting and can be usually seen at the edges of the walls and ceilings.

[Mary Bright]

Also,

The castle was founded built* in 1560 by the Black Prince.
*or: Work on the castle was started in 1560...

Can I write "Buidling of the castle was started in 1582"?

[Mary Bright]

I suppose I can assume the rule that concrete nouns preceded by a proper name are always capitalized. The rule goes with such concrete names as castle, palace, abbey, convent etc. Even if the names are local and known only in a small area.
Then how does the rule work with the titles of a prince, duke, earl and so on and so forth?
If it is Prince Henry, then I capitalize the word prince. But if I say about his family or the palace he lives in?

the Prince's or the prince's palace;

the Prince's or the prince's family?