The answer is 2: the "Treasures of Tutankhamun"
The title of the work is "Treasures of Tutankhamun", so it should be written inside the quotation marks without the definite article "the", since the article is not part of the title. There is another way of writing the title of a work in a sentence; it can be wrtten in italics. Quotation marks and italics are used to make a title stand out.