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
This is so subtle you need to bring your magnifier!
Source Carlos Valdez
Colour version of the original pattern.
Source Firkin
Prismatic Abstract Geometric Background 2 No Black
Source GDJ
Inspired by a 1930s wallpaper pattern I saw on TV.
Source Firkin
Abstract Tiled Background Extended 10
Source GDJ
Simple gray checkered lines, in light tones.
Source Radosław Rzepecki
A repeating gloomy background image. This one consists of a pattern of black chains layered on top of a dark textured background.
Source V. Hartikainen
Adapted heavily from a JPG that was uploaded to Pixabay by Viscious-Speed.
Source Firkin
Horizontal and vertical lines on a light gray background.
Source Adam Anlauf
You know I’m a sucker for these. Well-crafted paper pattern.
Source Mihaela Hinayon
This was formed by distorting an image of a background on Pixabay.
Source Firkin
From a drawing in 'Studies for Stories', Jean Ingelow, 1864.
Source Firkin
Here's a tile-able wood background image for use in web design.
Source V. Hartikainen
Alternative colour scheme. 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
From a drawing in 'Chambéry à la fin du XIVe siècle', Timoleon Chapperon, 1863.
Source Firkin
Could be paper, could be a Polaroid frame – up to you!
Source Chaos
Classy golf-pants pattern, or crossed stripes if you will.
Source Will Monson
Retro Circles Background 5 No Black
Source GDJ
A seamless pattern formed from a rectangular tile. The tile can be retrieved by selecting the rectangle in Inkscape and using shift-alt-i.
Source Firkin
From a drawing in 'Artists and Arabs', Henry Blackburn, 1868
Source Firkin
Zerro CC tillable texture of stones photographed and made by me. CC0
Source Sojan Janso