Not a problem, as long as you give the picture owner's their due credit, and letting them know. You're doing the right thing. Thanks. :-)
See, also,-Пирогово- ukraine folk village-interesting.
I have used it in my travelogue http://armchairtravelogue.blogspot.com and have given due credit to you.
Hope it is OK with you.
The travelogue is a non-profit ads free blog which I have created as a pastime and I do not derive any monetary benefit from it.