The idea I mentioned is for multiple memory palaces. I might have misunderstood the original question.
Number shapes:
- candle
- swan
- butterfly
- flag
- etc.
Memory palaces / rooms:
- Cafe #1a
- Cafe #1b
- Cafe #2
- Cafe #3a
- Cafe #4b
- etc.
Then to keep the palaces in order, a number shape can be put in front of each:
- candle in front of cafe #1a.
- swan in front of cafe #1b.
- butterfly in front of cafe #2.
- etc.
Here are some related discussions:
- Memory newbie here [questions about memory palace themes and organization]
- Mind Encyclopedia: Indexing Memory Palaces with Alphabetical Peg List
- https://forum.artofmemory.com/t/indexing-a-memory-palace/80884
- connecting & organising memory palaces
- Remembering collection of Peg lists?
- My organization method for all my mind palaces
- Indexing MP by alphabetizing