From a drawing in 'Chambéry à la fin du XIVe siècle', Timoleon Chapperon, 1863.
Source Firkin
Derived from an image that was uploaded to Pixabay by Kaz
Source Firkin
Simple combination of stripy squares with their negatively coloured counterparts
Source Firkin
From a drawing in 'Les Chroniqueurs de l'Histoire de France depuis les origines jusqu'au XVIe siècle', Henriette Witt, 1884.
Source Firkin
Prismatic Chevrons Pattern 5 With Background
Source GDJ
A version without colours blended together to give a different look.
Source Firkin
Not a pattern for fabrics, but one produced from a jpg of a stack of fabric items that was posted on Pixabay. The tile that this is based on can be had by selecting the rectangle in Inkscape and using shift+alt+i.
Source Firkin
Sounds like something from World of Warcraft. Has to be good.
Source Tony Kinard
Sometimes you just need the simplest thing.
Source Fabricio
Inspired by a drawing in 'Kulturgeschichte', Freidrich Hellwald, 1896.
Source Firkin
It’s a hole, in a pattern. On your website. Dig it!
Source Josh Green
Little x’es, noise and all the stuff you like. Dark like a Monday, with a hint of blue.
Source Tom McArdle
Prismatic Triangular Background Design Mark II 5
Source GDJ
Prismatic Geometric Pattern Background
Source GDJ
Derived from an image that was uploaded to Pixabay by starchim01
Source Firkin
This is the remix of "blue wave-seigaiha".The image depicts a seamless pattern of the front upper part of Japanese five yen coin which is used currently.This design represents a rice with ripe golden ears.
Source Yamachem
From a drawing in 'Les Chroniqueurs de l'Histoire de France depuis les origines jusqu'au XVIe siècle', Henriette Witt, 1884.
Source Firkin
From a drawing in 'Resa i Afrika, genom Angola, Ovampo och Damaraland', P. Moller, 1899.
Source Firkin
Fake or not, it’s quite luxurious.
Source Factorio.us Collective
As simple and subtle as it gets. But sometimes that’s just what you want.
Source Designova
Used a cherry by doctormo to make this seamless pattern
Source Firkin
This background pattern looks like bamboo to me. Feel free to download it for your website (for your blog perhaps?).
Source V. Hartikainen