Very dark pattern with some noise and 45-degree lines.
Source Stefan Aleksić
Kaleidoscope Prismatic Abstract No Background
Source GDJ
Vector version of a png that was uploaded to Pixabay by pencilparker
Source Firkin
From a drawing in 'Prose and Verse ', William Linton, 1836.
Source Firkin
A seamless texture traced from an image on opengameart.org shared by Scouser.
Source Firkin
A frame using leaves from an image that was uploaded to Pixabay by mayapujiati
Source Firkin
Zero CC tillable hard cover red book with X shape marks. Scanned and made by me.
Source Sojan Janso
This one takes you back to math class. Classic mathematic board underlay.
Source Josh Green
An alternative colour scheme for the original seamless texture formed from an image on Pixabay.
Source Firkin
Derived from a drawing in 'At home', J. Sowerby, J. Crane and T. Frederick, 1881.
Source Firkin
From a drawing in 'Art Embroidery', M.S. Lockwood and E. Glaister, 1878.
Source Firkin
Got some felt in my mailbox today, so I scanned it for you to use.
Source Atle Mo
Dare I call this a «flat pattern»? Probably not.
Source Dax Kieran
From a drawing in 'Gately's World's Progress', Charles Beale, 1886.
Source Firkin
Don’t look at this one too long if you’re high on something.
Source Luuk van Baars
Prismatic Rounded Squares Grid 3 No Background
Source GDJ
A seamless pattern the starting point for which was a 'light rays' rendering in Paint.net.
Source Firkin
From a drawing in 'Codogno e il suo territorio nella cronaca e nella storia'', Gio and Giarella Cairo, 1897.
Source Firkin
Adapted heavily from a JPG that was uploaded to Pixabay by Viscious-Speed.
Source Firkin
This is a seamless pattern of regular hexagon which has a honeycomb structure.
Source Yamachem
A seamless pattern with wide vertical stripes colored in pale yellow.
Source V. Hartikainen