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Pottermore, the online portal containing everything Harry Potter-related, has been spruced up. The site relaunched a “newly imagined” version Tuesday with an introductory note from Rowling, and an essay from the author, explaining the Potter family’s history.

Released Tuesday, the essay, “The Potter Family,” explains the Potter lineage from the 12th century onward, starting with wizard Linfred of Stinchcombe, whom Rowling describes as a locally well-beloved and eccentric man, and whose nickname, ‘the Potterer,’ became corrupted in time to ‘Potter.'”

She also explains how the Potters came to own the Invisibility Cloak:

Watch Rowling’s intro note for the new site below, and for the full “The Potter Family” essay, head to Pottermore.