Item from Harry Potter by J.K. Rowling
A shallow stone basin carved with runes around its rim, used to store and view extracted memories as immersive three-dimensional experiences — kept in the Headmaster's office at Hogwarts.
The Pensieve is where the series' backstory lives. Nearly everything Harry learns about Voldemort's past — his orphanage childhood, his Hogwarts years, his visits to Hepzibah Smith and Horace Slughorn, his transformation into something no longer quite human — comes through memories viewed in this basin. Dumbledore collected memories like evidence, building a psychological profile of Tom Riddle one silver thread at a time. The most critical memory was Slughorn's, which Slughorn had altered out of shame because it showed him telling young Riddle about Horcruxes. Harry's mission to extract the true memory from Slughorn was the key to understanding that Voldemort had made six Horcruxes (seven pieces of soul total). After Snape's death, his memories — poured into a vial as he died — revealed to Harry the full truth: Snape's love for Lily, his role as Dumbledore's double agent, and the fact that Harry himself was an unintended Horcrux who had to die.
A wide, shallow basin of carved stone, its rim inscribed with runes and strange symbols that seem to move in the light. The surface holds a silvery, gaseous substance — neither liquid nor gas — that swirls when disturbed. Extracted memories look like silver threads pulled from the temple with a wand. Touch the surface and you fall in, landing inside the memory as an invisible observer who can walk around and watch events unfold.
Also known as: the Pensieve, Pensieve, Dumbledore's Pensieve