Paintings are some of the secret collectibles in Dishonored 2. You can find them in each level as you progress through the game. Although there are some of them that are easy to find, there are also some that are hard to locate. Here's a guide on where to find all hidden paintings in Dishonored 2.
Dishonored 2 Mission 1
On your first main mission on Dishonored 2, you can find two paintings. The first painting named "Curtis, Morgan and the Postulate Child" can be found in the foyer right after you leave the Safe Room in Dunwall. This gives you 200 coins. The second painting named "The Obtuse Arguments of Lady Boyle" can be found in a building mounted with "For Rent" sign on it just along the streets where Dunwall is located. Go inside and take the stairs.
Edge Of The World Paintings
In this mission, there are four paintings you can look for. The "Overseer Painting" is in the building where you can see Deliah with a balcony under it. Go inside the building and then the balcony and find the room where the painting is located. "The Vice Overseer's Predicate Logic" is in the Overseers Office. "The Outsider in Conditional Dreams" is right beside the Outsider Shrine in the Apartment. "Hypatia's Protective Gaze" is locked up in the safe. Find the key at the back of the safe. This gives you 200 coins.
The Good Doctor Paintings
In this mission, there are three paintings to can find. "Duke Abele's Propositional State" is in the main lobby. "I Regard Her, Within and Without" is in Alexandria Hypatia's office. "Anton Sokolov in Subtractive Light" is in basement.
The Clockwork Mansion Paintings
Here, six paintings can be found. "The Spymaster's Axis of Asymmetry" is in a room on the third of the apartment located in an alley. Another painting is in the pipes leading to the balcony of a small building right before you if you are at the entrance of the sewers. "Jindosh Considers an Odd Numerator" is in the apartment nearest to the mansion. Proceed to the second floor. "The Grim Topology of Grim Alex" is in the basement where "Anton Solokov in Subtractive Light" is located. "I Look Upon the Craftsman" is near the tub in Jindosh's room. "Light Along the Inverse Curve" is in the room in front of Jindosh's.
The Royal Convervatory Paintings
In this mission, three paintings can be found. "Ashworth Within an Existential Graph" is in a room where a Hive Keeper is guarding. "My Fire Burn Within Breanna's Marrow" is in Breanna Ashworth's office. "Her Heart, I Bathed in Poison" is in the bookshelf inside a room with sign "Archive."
Dust District Paintings
Here, there are three painting up for grabs. "Indiscrete Time Finds Aramis Stilton is in the Overseer's Office. " Vera Moray and the Affix of Her Skin" and "Paolo and the Inaccessible Cardinal" are both in Paolo's room.
A Crack In The Slab Paintings
Here, two paintings can be found. "The Commutative Rats and the Weeper" is in the Vault door past the dining room. Enter the door and you'll travel back in time for you to get the painting. "The Torturer's Quaternionic Groan" is in the window in the doorway across the hall. Travel back in time to get the painting.
The Grand Palace Paintings
There are three paintings in this mission. "Daud and the Parabola of Lost Seasons" is in the room with the rune. "My Name on Their Lips" is on the third floor of the Palace. "Her Face is My Smile" is in the piano area in the palace.
Dishonored 2 is now available on PlayStation 4, Xbox One and Windows PC.