Are there more myths associated with medieval Jewish history than other kinds? Probably not. But one of them is that all medieval jews lived in stone houses and that all stone houses belonged to medieval jews. (I exaggerate but only a very little).
Not true! Either way around.
The map shows the spread of stone houses recorded in documents across the city of York in the twelfth, thirteenth and early fourteenth centuries. Yep - they were to be found in all the major streets and in both the city centre and its suburbs. Only two fragments of such houses survive. One -in Stonegate -was occupied by a canon of York Minster, who I guess was probably a Christian ;-). I recently saw somebody write that because it was stone it must have been Jewish - ach! The other we don't know for sure - but from the records we can say that most of these houses were not owned or occupied by Jews - but by all kinds of successful artisans and merchants, clerics, officials, farmers. For more discussion of why, how etc see an article by yours truly in Medieval Domesticity ed Kowaleski and Goldberg.
For more on Jews and stones see Here and I am sure elsewhere at In The Middle. Really - our persistent association of stones and Jews speaks to me of retrospective judgements we want to make about medieval Jews and their place in society.