In Sherlock the BBC TV series the protagonist Sherlock and the villain Magnussen are able to recall information from their mind similar to searching for a file in Windows. Is this really possible? If yes then I would be very much interested in knowing how to do this...:)

Let me clarify that this has nothing to do with having Idetic memory as it is mentioned by Sherlock that the memory palace is a technique and not a god gift.

  • Somehow I think that if it were that easy then we'd all be doing it.
    – Pharap
    Apr 17, 2014 at 6:23
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    This isn't really a Movies.SE question. You're taking something that did exist in movie, but asking a real life psychology question. Jul 7, 2018 at 13:52

6 Answers 6



To quote from The Independent about the source of mind palaces:

As it turns out, memory palaces like Holmes’ are a real thing, and have been for thousands of years. It all began with a lucky escape from a collapsing banquet hall by the Ancient Greek poet Simonides, who realised that by visualizing the room where the accident happened, he could perfectly recall the names of all his squashed fellow revellers. He later found a less morbid use for this discovery, by associating things he wanted to remember with walks through buildings he knew well.

The article goes on to describe how many mental athletes around the world use this technique to compete in memory championships, before interviewing a collection of these athletes.

Finally, to use the article's rather lovely conclusion as to why a palace could be useful:

In fact, the ‘Sherlock’ series 3 finale hinted at the prestige knowledge can have in the digitized world: sometimes the only truly safe place to keep information is your own brain. Also, knowing the number for a cab company is very helpful at 3am when your phone is dead. Long live the mind palace.

For more information, you can look up the Method of loci, which is what the memory palace is more traditionally known as. To quote from the Wiki:

'The method of loci', an imaginal technique known to the ancient Greeks and Romans and described by Yates (1966) in her book The Art of Memory as well as by Luria (1969). In this technique the subject memorizes the layout of some building, or the arrangement of shops on a street, or any geographical entity which is composed of a number of discrete loci. When desiring to remember a set of items the subject literally 'walks' through these loci and commits an item to each one by forming an image between the item and any distinguishing feature of that locus. Retrieval of items is achieved by 'walking' through the loci, allowing the latter to activate the desired items. The efficacy of this technique has been well established as is the minimal interference seen with its use.

The page also has an interesting collection of movies and television shows where the technique has been used.

As for learning it yourself? Try this article from Remember Everything

  • Just came here to mention Yates' book, which I read years ago in grad school: ISBN 978-0226950013, Frances Yates, The Art of Memory, available in paperback and ebook form, as is one of her sources, Giordano Bruno's De Umbris Idearum (e.g., ISBN 978-1492329961) [the same Giordano Bruno mentioned in Cosmos]. Apr 16, 2014 at 18:51
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    Maybe one should distinguish between 'mind palace' and 'mind palace as depicted in Sherlock' (e.g. Magnussen's "Google Glass"), because the OP mentions: ... recall information from their mind similar to searching for a file in Windows
    – Oliver_C
    Apr 16, 2014 at 19:15
  • @Oliver_C: Good point. I think the Independent part of the answer covers that a little, but definitely most of the stuff I came across online referred to the traditional idea of a mind palace. Apr 16, 2014 at 19:15
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    It's very real: en.wikipedia.org/wiki/World_Memory_Championships
    – Wayne
    Apr 16, 2014 at 22:19
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    As a former psychology student, I'd speculate that this method involves reinterpreting/associating semantic as/with episodic data in episodic memory. This probably works most of the time because the average human's episodic memory is generally better than their semantic memory due to the human need to learn from experience, however I would also wager that for some people their episodic memory is not necessarily as good as their semantic memory, in which case the technique would not be as effective. I'm just making an educated guess though, I could be completely wrong :P
    – Pharap
    Apr 17, 2014 at 6:21

Yes, but...

A mind palace consist of two steps: first, you imagine a location (loci, palace) real or fictitious and second, you must imagine a image association to your topic to memorize inside the location. Also, you need to make encoding to make your memorization simpler and quicker. The method of loci use the

First let's refer to the characters: Sherlock and Magnussen. They both memorize the information, it is not deduced. Though in the case of Sherlock if you are dedicated enough to memorize MO of criminals, statistics and more, it is understandable that he'd be able to make quick correlations between what he remembers and the problem at hand. Magnussen acquired information and memorized it, that's very ound. Both ways can be achieve with a lot of practice and dedication, unless you have curse gift (you have some autism plus better brain activity in memory).

Though thinking about how to survive a gunshot in 5 seconds (s2:e2) that's highly improbable.

For more about the method of loci and great feats of some famous mnemonists:
According to Pliny the Elder:

  • The king Cyrus (memorized his army of 10k immortals)
  • L. Scipio (could name the citizens of Rome, 200k+)
  • The king Pyrrhus (knew the name of many in the city, the senate, the chivalry)
  • The king Mithridates (reigned over 22 nations and commanded in their languages)
  • Charmidas(remembered the contents of books word by word)

Other mentions: Simonides Melicus, Metrodorus of Scepsis, Saint Thomas Aquinas, Cosmos Rossellius, Mateo Ricci(A Treatise On Mnemonics), Giordano Bruno, Francis Bacon, Rene Descartes, Robert Fludd, Johannes Romberch.

Note: I use this technique in my personal life for studying, knowledge and self development. An example of the effectiveness of this: I memorized the formulas of a class of math, then did the exercises from memory and in the exam I didn't even need to visit my palace, I have it integrated the information in my mind like if I knew these for a long time.


Yes sir.

Read about the method of loci. Create a small 20 loci palace in your home, just one room is all for now. Then encode, and subsequently, attempt to remember 20 random objects.You will surprise yourself, guaranteed. If you doubt it's efficacy and if you have the mettle, I'd recommend creating and testing a 100 palace loci and list.

Once you experience it, then creating a vast palace, or more specifically your own creativity, is the only barrier to having a memory like Hannibal or Sherlock.

Even having only a handful of palaces myself, I can say that what you place in your palace and recall regularly will integrate with you fast and on another level.

You will absolutely be able to start from any point in a list, for example, and go in either direction with ease. The technique was developed (after Simonides) for and by ancient orators, public speakers, as a way to perfectly remember a long speech.

  • If you could cite some resources and/or references, then this answer'll be lot better
    – Vishwa
    May 22, 2019 at 6:02

Yes! Though there are a few caveats, it is very possible. There are many memory athletes out there that compete in memorizing a bunch of things (like decks of cards, names and faces, random words...) using the method of Loci.

The thing about a memory palace is that it is hard to get right. Sherlock's representation was, unfortunately, incorrect because he didn't have different locations within his palace. In a sense, his mental palace was more for mental retreat rather than storing information or processing things. To be able to really use your palaces well, you need to have consistency in the size of each location, be very familiar with it, and then all you need to do is just imagine yourself walking through it!

Another issue people face is "cleaning up". This might sound weird but sometimes loci might ghosts of previous information you put there. I'm not sure what exactly people do about this (I'm a memory athlete, but I have always had an issue with this), but it's kind of cool to think about since it's almost like a real physical location.



The kind of mind palace portrayed in Sherlock isn't possible for a normal person. Like most things on TV, they don't work that way in real life.

The technique that the mind palace is based on has been known for thousands of years at least, but it is only really suited to recalling lists of items. The order of cards in a deck, the name of every king of England, digits of Pi etc.

In older versions of Windows when you searched for a file the computer had to simple go through every file in order until it found the one you wanted. A mind palace works like that, it can't be used to simply recall the 37th card in the deck without going through the earlier ones first. Newer versions of Windows create a database of files that allows the OS to quickly skip ahead to the one you want.

--- Edit: ---

Reference: http://remembereverything.org/memory-palace-the-method-of-loci/

"The method of loci is essentially a visual filing system, allowing you to memorize and recall a virtually unlimited number of items in a fixed order." In the TV show characters are shown as using a Mind Palace as random-access storage for brainstorming and free association, as well as instant recall of random facts.

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    I'm just wondering you reference for your statements? It seems to directly contradict what Andrew's answer says. If you quote some sources, your vote count is going to be much higher. Apr 17, 2014 at 11:20
  • Is this not what Sherlock did in the series though? He went through every reference of "Hound" until he got to what he was after - he didn't just jump to the right place. Apr 17, 2014 at 16:29
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    He did a random search of things related to "hound" in his memories. For it to be a real mind palace he would have had to previously research all those things and memorize them in the exact order he recalled them. The mind palace isn't google for your existing memories.
    – user9146
    Apr 17, 2014 at 21:03
  • Actually, I would differ. The same way you can add data to be remembered in the locations of your mind palace, you could easily assign a numeric and permanent point of data that can easily act as an index. This would allow you to add a new item alongside the index-like piece of data and you can remember the index-like piece of data first and its location and then you can retrieve whatever extra data you put in there. It's all about mental imagery.
    – sergeidave
    Oct 3, 2019 at 2:57
  • This is the answer promoted by Google, and is wrong, it's possible given enough trying - it builds up slowly and is poor in resolution to start, but if you can remember the way to the shop in your mind then you can start to make your own streets and journeys that you'll similarly remember. Google suggests this answer with 0 upvotes, incredible!
    – Vix
    Nov 14, 2021 at 15:41

I remembering hearing Ken Campbell talk about time he met Marvin Minsky - MM would have ideas that he wasn't able to process right at that moment, so "put" the new idea into an empty jar that he would come back to - apparently he had shelves full!

Maybe not quite the same as a "Mind Palace", but certainly a different way of considering memory and perception

There's an interview between the two of them here - https://www.youtube.com/watch?v=9U7AluDUoZA - haven't got time to watch it now, but it'll certainly be worth having a look at

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