Small gradient crosses inside 45-degree boxes, or bigger crosses if you will.
Source Wassim
A rusty grunge background for websites. Feel free to use it in your site's theme.
Source V. Hartikainen
Very dark pattern with some noise and 45-degree lines.
Source Stefan Aleksić
From a drawing in 'Art Embroidery', M.S. Lockwood and E. Glaister, 1878.
Source Firkin
One more from Badhon, sharp horizontal lines making an embossed paper feeling.
Source Badhon Ebrahim
Pattern Background, Texture, Photoshop Structure style CC0 texture.
Source Darkmoon1968
This is the remix of "Background pattern 115" uploaded by "Firkin".Thanks.
Source Yamachem
Prismatic Geometric Tessellation Pattern 3 No Background
Source GDJ
The tile this is based on can be had by selecting the rectangle in Inkscape and using shift+alt+i
Source Firkin
A seamless pattern created from a square tile. To get the tile, select the pattern in Inkscape and use shift+alt+i.
Source Firkin
Derived from a corner decoration itself found as a jpg on Pixabay.
Source Firkin
From a drawing in 'A Guide to the Guildhall of the City of London', John Baddeley, 1898.
Source Firkin
No relation to the band, but damn it’s subtle!
Source Thomas Myrman
Retro Circles Background 8 No Black
Source GDJ
Green Background Pattern
Source V. Hartikainen
Submitted as a black pattern, I made it light and a few steps more subtle.
Source Andy
Medium gray fabric pattern with 45-degree lines going across.
Source Atle Mo
Nicely executed tiling for an interesting pattern.
Source Ignasi Àvila Padró
The edges of all the red objects line up either vertically or horizontally, but it doesn't appear so. Made from a square tile that can be got by selecting the rectangle in Inkscape and using shift+alt+i.
Source Firkin