I was thinking about Latin borrowings in early Anglo-Saxon.
I knew there quite a number of Latin words had already been adopted into Germanic languages on the Continent, before the Angles, Saxons and Jutes (the traditional names), had migrated to Britain, so I Googled for examples off these. An interesting one I came across was kitchen, reconstructed to be from an early Germanic word *kokina, a borrowing from Latin coquina.
If the borrowing was early enough, I reasoned, all modern Germanic languages would use similar words for kitchen, so I checked German and Dutch and the Scandinavian languages and they nearly all did. The only outlier was Icelandic.
An Icelandic kitchen is an eldhús, el-Tuss. and digging a bit deeper revealed this was the Old Norse word too, and it means 'fire-house', so it probably harks to back what kitchens were called before the borrowing of what may have been a prestige loanword *kokina (think of cuisine usedinstead of cooking).
What about the Temple and the Hearth alluded to in the title of this post? The hus part of the Icelandic word is recognizably the same as English, perhaps as used in words like smokehouse or icehouse. The other element eld means 'fire', in the sense of hearth, which survives as a rare Scots or North of England dialect word elding, 'kindling or fuel for a fire', and surprisingly eld is cognare with the first element Latin aedificium, 'building with hearth' = temple, because at some distant time temples were thought of as places containing a hearth, presumably because the hearth is the focal point of a home, and a temple is the home of a deity
The same Proto-Indo-European root is seen in words associated with heat or burning in several different languages, such English oasthouse, 'drying shed', Greek aether, 'upper air, and Welsh aidd, 'burning zeal'.