Up to 40% off sitewide: Yes, everything.
ends soon
Sell your art
Login
Signup
Caps
Retro mountain with trees
Redbubble logo
Explore
For You
Retro Gaming
Horror
Sci-Fi
Pride
Pop-Culture
Fresh Finds
Fan Art
Clothing
New
All Clothing
T-Shirts
New
Hoodies & Sweatshirts
Hats
Socks
Dresses
Tank Tops
Stickers
All Stickers
Holographic Stickers
Funny Stickers
Car Stickers
Bumper Stickers
Water Bottle Stickers
Cool Stickers
Anime Stickers
Laptop Stickers
Magnets
Custom Stickers
Phone Cases
All Phone Cases
iPhone Cases
Samsung Galaxy
New
Wall Art
All Wall Art
Posters
Photographic Prints
Art Prints
Tapestries
Canvas Prints
Framed Prints
Art Board Prints
Home & Living
All Home & Living
Mugs
Throw Pillows
Throw Blankets
Tapestries
Magnets
Aprons
Coasters
Jigsaw Puzzles
Duvet Covers
Acrylic Blocks
Clocks
Shower Curtains
Bath Mats
Kids & Babies
All Kids Clothes
Kids T-Shirts
Baby One-Pieces
Kids Pullover Hoodies
Accessories
All Accessories
Hats
Socks
Pins
Backpacks
Tech Accessories
Tote Bags
Makeup Bags
Toiletry Bags
Zipper Pouches
Duffle Bags
Scarves
Stationery & Office
All Stationery & Office
Greeting Cards
Spiral Notebooks
Mouse Pads & Desk Mats
Postcards
Hardcover Journals
Gifts
All Gifts
Gifts for Dad
Gifts for Gamers
Gifts for Her
Gifts for Him
Gifts for Animal Lovers
Gifts Under $50
Gifts for Outdoorsy Types
Gifts for Kids
Stocking Stuffers
Gift Cards
Forbidden Knowledge Caps
222 items
Hats
Filters (3)
222 items
Most Relevant
Forbidden Knowledge With Banned Books Dad Hat
Unhinged Heather
$22.30
$26.24
(15% off)
The Book of Forbidden Knowledge Dad Hat
Mompreneur and Daughter
$21.05
$24.77
(15% off)
Funny Skeleton Read Banned Books Gain Forbidden Knowledge Dad Hat
LeanneCarolina
$21.41
$25.19
(15% off)
Skeleton Read Banned Books Gain Forbidden Knowledge Dad Hat
endabettyau
$21.41
$25.19
(15% off)
Funny Skeleton Read Banned Books Gain Forbidden Knowledge Dad Hat
EileenDeana
$21.41
$25.19
(15% off)
The Apple Dad Hat
ThreeFrenchies
$21.41
$25.19
(15% off)
Amphitheatre of Eternal Wisdom Dad Hat
Esopost
$21.41
$25.19
(15% off)
Wizards study Dad Hat
Golden Morning
$22.30
$26.24
(15% off)
Golden Enigma Unleashed! | Mystery and Secrets Abound! Dad Hat
PopPopGfx
$25.33
$29.81
(15% off)
Funny Skeleton Read Banned Books Gain Forbidden Knowledge Dad Hat
EarlineImogene
$21.41
$25.19
(15% off)
Tenebrosum Sanctuarium Dad Hat
TerraTartarus
$19.62
$23.09
(15% off)
Knowledge Comes At A Cost Dad Hat
scarlov
$21.41
$25.19
(15% off)
Lizard With Forbidden Knowledge Dad Hat
Imaginarium of Chaos falcon88
$26.22
$30.85
(15% off)
Grimoires of forbidden knowledge Dad Hat
Chr002
$21.41
$25.19
(15% off)
Eve Dad Hat
ArtByBeatriz
$21.41
$25.19
(15% off)
Read What They Don’t Want You To! Dad Hat
ActOutTees
$21.41
$25.19
(15% off)
The Keyholder Dad Hat
ONYX Pixee
$21.41
$25.19
(15% off)
Platonic solids Dad Hat
DimensionFour
$21.41
$25.19
(15% off)
Ask me about Shivambu! Dad Hat
WinterTempest
$21.41
$25.19
(15% off)
Cephalopod Scholar: Keeper of Forbidden Knowledge Dad Hat
dungeonwarriors
$19.27
$22.67
(15% off)
apple dream garden Dad Hat
smalldrawing
$22.30
$26.24
(15% off)
Suppressing Knowledge Is a Sin – Occult Eye Symbol Gold Art Dad Hat
SoulenCify
$19.62
$23.09
(15% off)
Consultation With The Library Guardian Dad Hat
ScaryDoom
$23.73
$27.92
(15% off)
The Rogue’s Cipher Dad Hat
The Ravens Tome
$21.41
$25.19
(15% off)
Ancient Library Mysteries Dad Hat
ByteyCreatives
$23.19
$27.29
(15% off)
organic apple Dad Hat
smalldrawing
$22.30
$26.24
(15% off)
Cursed with Forbidden Knowledge Pigeon Dad Hat
VintageMedatsu
$21.41
$25.19
(15% off)
Reading is Dangerous Knowledge Vintage Magic Book Dad Hat
SplashTastic
$18.73
$22.04
(15% off)
"Cryptic Chronicles: Unveiling Forbidden Knowledge" Dad Hat
AS-Graphics
$21.41
$25.19
(15% off)
Forbidden Knowledge With Banned Books Dad Hat
Unhinged Heather
$22.30
$26.24
(15% off)
The Fish and Forbidden Knowledge Dad Hat
Printaso
$21.41
$25.19
(15% off)
The Astro Chart from Dr. Alesha Sivartha Dad Hat
MysteryHisStory
$24.98
$29.39
(15% off)
"Read" Banned Books Dad Hat
GreggM Art
$21.41
$25.19
(15% off)
Adam & Eve, the original sin Dad Hat
PariSeine
$21.41
$25.19
(15% off)
he Crowned Serpent - Eternal Knowledge Forbidden Fruit Dad Hat
Zacushi
$21.77
$25.61
(15% off)
VI, The Lovers Dad Hat
Robert Saenz
$21.41
$25.19
(15% off)
READ BANNED BOOKS GAIN FORBIDDEN KNOWLEDGE Dad Hat
SnorkleSupply
$21.41
$25.19
(15% off)
'Forbidden Chained Book' Gothic Horror Dark Fantasy Illustration Dad Hat
Ghoul Enterprises
$21.41
$25.19
(15% off)
The Tree of The Knowledge of Good And Evil Dad Hat
Bexcy_Boo
$23.19
$27.29
(15% off)
Reading is Dangerous Locked Book Dad Hat
SplashTastic
$18.73
$22.04
(15% off)
Cursed With A Curious Mind Witchy Book Lover Tee Dad Hat
PunchDrop
$21.41
$25.19
(15% off)
Future's Forbidden Secrets Design Dad Hat
Health And Fitness Posts e-Store
$24.98
$29.39
(15% off)
Skeleton Read Banned Books Gain Forbidden Knowledge Dad Hat
jayeshainch
$21.41
$25.19
(15% off)
Gothic Angel Occult Design - THE WATCHER Dad Hat
Heretical-Crow
$19.62
$23.09
(15% off)
Gothic Snake & Crystal Thorned Vines Purple Green Dad Hat
Sturdust
$21.41
$25.19
(15% off)
Nyxara, Goddess of Dark Knowledge – Keeper of Hidden Mysteries Dad Hat
HighestMind_888
$23.19
$27.29
(15% off)
Eve After Eating the Forbidden Fruit (Corrosive Knowledge) Dad Hat
Art.From_Inside
$21.41
$25.19
(15% off)
Necronomicon Dad Hat
GalleryBrisArt
$21.41
$25.19
(15% off)
Tell No Truths Dad Hat
AbstractAnom
$21.41
$25.19
(15% off)
System Crash: Secret Society of Autodidacts Dad Hat
InnerwayStudio
$22.12
$26.03
(15% off)
Forbidden Knowledge Society Shield Crest Cthulhu Skull Gothic Dad Hat
Fenay Designs
$21.41
$25.19
(15% off)
Aetron God of Forbidden Knowledge Cyberpunk Aesthetic - Secret Society Dark Sci-Fi Art - Techwear Hacker Graphic for Streetwear, Hoodies & Posters - Dystopian Occult Digital Deity Design Dad Hat
Vivaan Studio
$22.30
$26.24
(15% off)
Folk Remedies & Forbidden Roots Dad Hat
Milena R.
$19.62
$23.09
(15% off)
Forbidden Eye of the Unknown, fusion of conspiracy and occult symbolism. Dad Hat
Absyntart
$21.41
$25.19
(15% off)
Funny Skeleton Read Banned Books Gain Forbidden Knowledge Dad Hat
ElaineEsther
$21.41
$25.19
(15% off)
Metatron's Cube Dad Hat
DimensionFour
$21.41
$25.19
(15% off)
Read Banned Books, Gain Forbidden Knowledge Dad Hat
Fawny Little Things
$19.62
$23.09
(15% off)
Infinite Library of Knowledge - Eye of Wisdom Surreal Art Dad Hat
TitanRN
$19.45
$22.88
(15% off)
Go away, I'm studying forbidden knowledge Dad Hat
EpicEndeavours
$21.41
$25.19
(15% off)
Read Banned Books - Gain Forbidden Knowledge Dad Hat
Unhinged Heather
$22.30
$26.24
(15% off)
RESEARCH TARTARIA | HIDDEN HISTORY FORBIDDEN KNOWLEDGE Dad Hat
axelle1410
$21.41
$25.19
(15% off)
Read Banned Books Gain Forbidden Knowledge Dad Hat
Unhinged Heather
$22.30
$26.24
(15% off)
RESEARCH TARTARIA | HIDDEN HISTORY FORBIDDEN KNOWLEDGE Dad Hat
axelle1410
$21.41
$25.19
(15% off)
Crimson Bloom and Forbidden Secrets Dad Hat
PanoramaPrints
$21.41
$25.19
(15% off)
Department of Forbidden Books | Antique University Seal | Dark Academia Library Design Dad Hat
MrDev
$24.08
$28.34
(15% off)
The Second Warning Dad Hat
AbstractAnom
$21.41
$25.19
(15% off)
Dragon's Sanctum: The Gothic Library Enclave Dad Hat
oanaunciuleanu
$21.41
$25.19
(15% off)
Dragon's Sanctum: The Gothic Library Enclave Dad Hat
oanaunciuleanu
$21.41
$25.19
(15% off)
Dragon's Sanctum: The Gothic Library Enclave Dad Hat
oanaunciuleanu
$21.41
$25.19
(15% off)
The Forgotten Archive Dad Hat
AbstractAnom
$21.41
$25.19
(15% off)
Dragon's Sanctum: The Gothic Library Enclave Dad Hat
oanaunciuleanu
$21.41
$25.19
(15% off)
Dragon's Sanctum: The Gothic Library Enclave Dad Hat
oanaunciuleanu
$21.41
$25.19
(15% off)
Dragon's Sanctum: The Gothic Library Enclave Dad Hat
oanaunciuleanu
$21.41
$25.19
(15% off)
Dragon's Sanctum: The Gothic Library Enclave Dad Hat
oanaunciuleanu
$21.41
$25.19
(15% off)
Faculty of Dangerous Curiosity | Academic Seal of Forbidden Knowledge | Dark Academia Scholar Design Dad Hat
MrDev
$24.08
$28.34
(15% off)
The Final Confession Dad Hat
AbstractAnom
$21.41
$25.19
(15% off)
Dragon's Sanctum: The Gothic Library Enclave Dad Hat
oanaunciuleanu
$21.41
$25.19
(15% off)
Flower of Life Dad Hat
DimensionFour
$21.41
$25.19
(15% off)
Dragon's Sanctum: The Gothic Library Enclave Dad Hat
oanaunciuleanu
$21.41
$25.19
(15% off)
Forbidden Grimoire of the Dark Priest Dad Hat
photoparadise22
$21.41
$25.19
(15% off)
Dragon's Sanctum: The Gothic Library Enclave Dad Hat
oanaunciuleanu
$21.41
$25.19
(15% off)
The Tome Remembers Dark Fantasy Book Poster Dad Hat
Sketchlegacy
$24.98
$29.39
(15% off)
Reading Club for Dangerous Knowledge Dad Hat
LoveLaxmi Arts
$18.91
$22.25
(15% off)
Miskatonic University Rationalist Emblem Dad Hat
Phoeby Art Shop
$21.41
$25.19
(15% off)
Alexander Pushkin quote: We’ve got to have forbidden fruit, Or Eden’s joys for us are moot. Dad Hat
artbleed
$21.59
$25.40
(15% off)
The Arcane Oath Dad Hat
The Ravens Tome
$21.41
$25.19
(15% off)
The Waterfall of Infinite Knowledge Sumi-e Ink Wash Dad Hat
DuckOddity
$21.41
$25.19
(15% off)
Miskatonic University — a symbol of rationalism and the Promethean spirit Dad Hat
Phoeby Art Shop
$21.41
$25.19
(15% off)
Miskatonic University — a symbol of rationalism and the Promethean spirit Dad Hat
Phoeby Art Shop
$21.41
$25.19
(15% off)
Would you refuse a taste of Forbidden Fruit? Dad Hat
impressionofmel
$21.41
$25.19
(15% off)
Become a member.
Get 25% off your first order.
Plus other neat perks and exclusive savings to help you find the very thing.
Sign up
Previous
1
2
3
Next
Dark Fantasy
Cthulhu
Glowing Eyes
Lovecraftian Horror
Anime Manga Style
Deep Sea Nightmare
Eerie Atmosphere
Monstrous Creature
Ominous Presence
Otherworldly Entity
Tentacled Horror
Dark Academia
Gothic Horror
Worldwide Shipping
Available as standard or express delivery
Learn more
- opens in new window or tab
Secure Payments
100% Secure Payment with 256-bit SSL encryption
Learn more
- opens in new window or tab
Free Return
Exchange or money back guarantee for all orders
Learn more
- opens in new window or tab
Local Support
24/7 Dedicated support
Learn more
- opens in new window or tab
