I guess this is inspired by the city of Ravenna in Italy and its stone walls.
Source Sentel
Abstract Tiled Background Extended 12
Source GDJ
Super subtle indeed, a medium gray pattern with tiny dots in a grid.
Source Designova
This was formed by distorting an image of a background on Pixabay.
Source Firkin
I asked Gjermund if he could make a pattern for us – result!
Source Gjermund Gustavsen
A comeback for you: the popular Escheresque, now in black.
Source Patten
This one could be the shirt of a golf player. Angled lines in different thicknesses.
Source Olivier Pineda
The image depicts a seamless pattern of a Japanese family crest called "chidori" in Japanese .A chidori in Japanese means a plover in English.
Source Yamachem
I’m not going to use the word Retina for all the new patterns, but it just felt right for this one. Huge wood pattern for ya’ll.
Source Atle Mo
Derived from an image that was uploaded to Pixabay by Kaz
Source Firkin
This is a semi-dark pattern, sort of linen-y.
Source Sagive SEO
Prismatic Hypnotic Pattern No Background
Source GDJ
To get the tile this is based on select the rectangle in Inkscape and use shift-alt-i
Source Firkin
This texture looks like old leather. It should look great as a background on web pages.
Source V. Hartikainen
Simple wide squares with a small indent. Fits all.
Source Petr Šulc.
Seamless , tileable CC-0 texture. Created by my own, feel free to use wherever you want!
Source Linolafett
A seamless texture traced from an image on opengameart.org shared by Scouser.
Source Firkin
Looks a bit like concrete with subtle specks spread around the pattern.
Source Mladjan Antic
From a drawing in 'Codogno e il suo territorio nella cronaca e nella storia'', Gio and Giarella Cairo, 1897.
Source Firkin