The "Book of the Dead" first developed in Thebes toward the beginning of the Second Intermediate Period, around 1700 BCE. The earliest known occurrence of the spells included in the "Book of the Dead" is from the coffin of Queen Mentuhotep, of the 13th Dynasty, where the new spells were included amongst older texts known from the Pyramid Texts and Coffin Texts. Some of the spells introduced at this time claim an older provenance; for instance the rubric to spell 30B states that it was discovered by the Prince Hordjedef in the reign of King Menkaure, many hundreds of years before it is attested in the archaeological record.