Final answer:
Freya's necklace, known as Brisingamen, was created in the mythological realm of Norse mythology by the dwarves, renowned for their crafting skills.
Step-by-step explanation:
The realm in which Freya's necklace, also known as Brisingamen, was created isn't a geographical one, but rather a mythological one.
It was supposedly crafted by the dwarves, a group of beings existing in Norse mythology.
They are known for their exceptional skills in crafting and metalwork, creating many of the divine tools and weapons for the Norse gods, including Freya's necklace.
Although this isn't exactly represented in the references provided, Greek, Egyptian, and other forms of mythology often share similar elements, such as powerful objects created by semi-divine beings, often useful in the realm of the gods – comparable to Norse mythology.
Learn more about Norse Mythology