See Also: P_O_W
It not only is misleading, you can consider it being offensive as it implies Christianity is historic. You simply can't do that.
I also support putting it as a subcategory under amenity=place_of_worship. Ozjoghurt 20:22, 04 Sept 2013 (UTC)
Where was this tag "approved"?
Has this tag been voted for or otherwise approved or at least discussed somewhere? It currently reads "status = Approved". I also find it quite rude to generally categorize religious items as "historic". Nillerdk (talk) 13:58, 25 November 2013 (UTC)
From http://wiki.openstreetmap.org/wiki/Historic : The historic=* key is used to identify features that are of historic interest. So if a given wayside cross itself is of historic interest you might consider using this tag. Or not. If you don't think it is, or don't want to generally categorize religious item as "historic" you can still use :
Now that I think of it... both place_of_worship and historic may be subject to discussion for any specific cross. I'd rather use man_made...