I guess this is inspired by the city of Ravenna in Italy and its stone walls.
Source Sentel
A seamless web background with texture of aged grid paper.
Source V. Hartikainen
To get the tile this is based on select the rectangle in Inkscape and use shift-alt-i.
Source Firkin
One can never have too few rice paper patterns, so here is one more.
Source Atle Mo
Seamless , tileable CC-0 texture. Created by my own, feel free to use wherever you want!
Source Linolafett
This beige background pattern resembles a concrete wall with engravings or something similar to it.
Source V. Hartikainen
Remixed from a drawing that was uploaded to Pixabay by ractapopulous
Source Firkin
Prismatic Groovy Concentric Background No Black
Source GDJ
Drawn in Paint.net and vectorised in Vector Magic
Source Firkin
Looks like an old rug or a computer chip.
Source Patutin Sergey
A nice one indeed, but I have a feeling we have it already? If you spot a copy, let me know on Twitter.
Source Graphiste
Inspired by a pattern seen on a public domain image of a very old tile. To get the unit cell, select the rectangle in Inkscape and use shift+alt+i.
Source Firkin
Sort of like the back of a wooden board. Light, subtle, and stylish, just the way we like it!
Source Nikolalek
Remixed from a drawing in 'Line and form', Walter Crane, 1914.
Source Firkin
This makes me wanna shoot some pool! Sweet green pool table pattern.
Source Caveman
If you’re sick of the fancy 3D, grunge and noisy patterns, take a look at this flat 2D brick wall.
Source Listvetra
Just like your old suit, all striped and smooth.
Source Alex Berkowitz
Like the name says, light and gray, with some small dots and circles.
Source Brenda Lay
Light gray grunge wall with a nice texture overlay.
Source Adam Anlauf
Awesome name, great pattern. Who does not love space?
Source Nick Batchelor
With a name this awesome, how can I go wrong?
Source Nikolay Boltachev
ZeroCC tileable wood boards texture, photographed and made by me. CC0
Source Sojan Janso
Nasty or not, it’s a nice pattern that tiles. Like they all do.
Source Badhon Ebrahim