A memory palace is a mental walk through a place you know well, a childhood home or your daily commute, with each thing you want to remember parked at a specific spot along the route. To recall the list, you take the walk again and collect what you left. The technique is ancient, used by Greek and Roman orators, and it has a formal name: the method of loci, Latin for "places."
It genuinely works, and the evidence is unusually strong
Most study tricks rest on thin research. This one does not.
In a 2003 study at University College London, scientists scanned ten of the world's top memorizers. They had no higher IQs and no structural differences in their brains. Nine of the ten simply used the method of loci. In a 2017 training study, fifty-one people with ordinary memories trained the method for six weeks. Their recall of a 72-word list more than doubled, from around 26 words to 62, and their brain activity started to resemble the champions'. The gains were still there four months later. A 2025 meta-analysis across decades of work found a large effect for remembering things in order.
So the palace is not a party trick. It is one of the best-evidenced memory tools we have.
How to build one
- Pick a place you know cold. Your home works best to start.
- Fix a route through it: front door, hallway, kitchen, always in the same order.
- Place each item at a stop as a vivid, strange image. To remember milk, picture a cow flooding your hallway with it. Odd and exaggerated sticks; bland does not.
- Walk the route to recall. The order comes free, because the route already has one.
What it is good at, and what it is not
The method of loci is superb for ordered or arbitrary information: a speech, a shopping list, a string of digits, the cranial nerves before an exam. It is how competitors memorize a shuffled deck in under a minute.
It is a poor fit for most of what you actually do. Building a palace takes effort, and it stores facts, not understanding. It will not help you grasp why an argument holds together; that is the job of the Feynman Technique. And for the sheer volume of things a working adult needs to keep, palaces do not scale. Here honesty matters: for almost everything outside an exam hall, the right move is not to memorize at all. Write it down. A good note is memory you can trust, and it frees your attention for thinking instead of storage, which is the whole idea behind a second brain.
If you do need durable recall without a device, pair the palace with spaced repetition. The palace gets the information in; spacing fights the forgetting curve and keeps it there. Loci without review still fades.
The honest verdict
Learn the method of loci for the narrow cases that earn it: a talk you want to give without notes, material for a closed-book test, anything you must recall on the spot. For the rest of your knowledge, lean on good notes and the other tools in Memory & Focus. The most useful memory skill is knowing which things are worth memorizing at all.