From a drawing in 'Gately's World's Progress', Charles Beale, 1886.
Source Firkin
Super subtle indeed, a medium gray pattern with tiny dots in a grid.
Source Designova
Background Wall, Art Abstract, Watercolor Vintage style CC0 texture.
Source Ractapopulous
A free green background pattern with a pattern of rhombuses on a seamless texture. Feel free to use it as a tiled background image on your web site.
Source V. Hartikainen
A seamless texture traced from an image on opengameart.org shared by Scouser.
Source Firkin
Almost like little fish shells, or dragon skin.
Source Graphiste
People seem to enjoy dark patterns, so here is one with some circles.
Source Atle Mo
Looks as if it's spray painted on the wall. You can be sure that this pattern will seamlessly fill your backgrounds on web pages.
Source V. Hartikainen
Prismatic Curved Diamond Pattern 6 No Background
Source GDJ
We have some linen patterns here, but none that are stressed. Until now.
Source Jordan Pittman
Here's a camo print with more tan and less green, such as might be used in a desert scenario. This is tileable, so it can be used as a wallpaper or background.
Source Eady
Submitted in a cream color, but you know how I like it.
Source Devin Holmes
It has waves, so make sure you don’t get sea sickness.
Source CoolPatterns
A background pattern inspired by designs seen in 'Burghley. The Life of William Cecil', William Charlton, 1857.
Source Firkin
The tile this is based on was adapted from an image that was uploaded to Pixabay by frolicsomepl. It can be had in Inkscape by selecting the rectangle and using shift+alt+i
Source Firkin
This makes me wanna shoot some pool! Sweet green pool table pattern.
Source Caveman
The original enhanced with some gradients.
Source Firkin
Vertical lines with a bumpy, yet crisp, feel to it.
Source Raasa