No one understands why medieval Europeans would place their shoes in odd places. Many speculate that it may have been a superstitious practice, but what is even more interesting is that similar kinds of shoes have also been discovered in a temple in Egypt and from a time when Egyptians were believed to have still been wearing sandals. There are only two possibilities as to how this could be:

1. The Egyptians produced footwear more sophisticated than once believed.

2. The Egyptians acquired the shoes through trade with the Europeans. If that is the case, then Europeans and Egyptians had been in contact with one another throughout a much longer span of history than first thought. And if the shoes had originated in Europe, then that means that pre-medieval Europeans were more advanced than once believed.
https://www.ancientpages.com/2....021/10/02/mystery-of

https://www.ancientpages.com/2....014/03/29/unsolved-a