Could someone post a list of them? I decided to get the achievement and I don't want to replay a mission just because of missing one painting. Please do not mention the locations, I want to find them all myself.

In order of appearance.

Coldridge Prison - none
Hound Pits Pub - none
High Overseer Campbell - 1
Golden Cat - 3
Royal Physician - 1
Boyle Estate - 2
Return to Dunwall Tower - 1
Flooded District - 3
Assault on Pub - none
Lighthouse - none

Thank you very much.