Sounds French. Some 3D square diagonals, that’s all you need to know.
Source Graphiste
From a drawing in 'Cassell's Library of English Literature', Henry Morley, 1883.
Source Firkin
Background Wall, Art Abstract, Block Well & CC0 texture.
Source Ractapopulous
Number 2 in a series of 5 beautiful patterns. Can be found in colors on the submitter’s website.
Source Janos Koos
From a drawing in 'Artists and Arabs', Henry Blackburn, 1868
Source Firkin
This seamless pattern consists of a blue grid on a yellow background.
Source V. Hartikainen
Submitted in a cream color, but you know how I like it.
Source Devin Holmes
This one is rather fun and playful. The 2X could be used at 1X too!
Source Welsley
Prismatic Geometric Tessellation Pattern 3 No Background
Source GDJ
To get the tile this is based on, select the rectangle in Inkscape and use shift+alt+i.
Source Firkin
Remixed from a raster on Pixabay, that was uploaded by ArtsyBee.
Source Firkin
Utilising some flowers from Almeidah. To get the unit tile, select the rectangle in Inkscape and use shift-alt-i.
Source Firkin
A free light orange brown wallpaper with vertical stripes designed for use as a tiled background on websites. An yet another background pattern with vertical stripes.
Source V. Hartikainen
A pale orange background pattern with glossy groove stripes.
Source V. Hartikainen
Super dark, crisp and detailed. And a Kill Bill reference.
Source Badhon Ebrahim
Prismatic Snowflakes Pattern 3 No Background
Source GDJ
A floral background formed from numerous clones of flower 117.
Source Firkin
Super subtle indeed, a medium gray pattern with tiny dots in a grid.
Source Designova
Bigger is better, right? So here you have some large carbon fiber.
Source Factorio.us Collective
Can never have too many knitting patterns, especially as nice as this.
Source Victoria Spahn
Prismatic Groovy Concentric Background 2 No Black
Source GDJ
Looks a bit like concrete with subtle specks spread around the pattern.
Source Mladjan Antic
The classic subtle pattern. Sort of wall/brick looking. Or moon-looking?
Source Joel Klein