Formed by heavily distorting part of a an image of a fish uploaded to Pixabay by GLady
Source Firkin
Dark squares with some virus-looking dots in the grid.
Source Hugo Loning
The unit cell for this seamless pattern can be had in Inkscape by selecting the rectangle and using shift+alt+i
Source Firkin
Prismatic Geometric Tessellation Pattern No Background
Source GDJ
A seamless texture of worn out "cardboard".
Source V. Hartikainen
A new one called white wall, not by me this time.
Source Yuji Honzawa
From a drawing in 'Heroes of North African Discovery', Nancy Meugens, 1894.
Source Firkin
CC0 and a seamless pattern from a tile drawn in Paint.net .
Source SliverKnight
Prismatic Abstract Geometric Background 4 No Black
Source GDJ
Recreated from a pattern found in 'Az Osztrák-Magyar Monarchia irásban és képben', 1882. To get the tile this is based on select the rectangle in Inkscape and use shift+alt+i.
Source Firkin
A seamless gray background texture suitable for use on websites. To me, it has the look of stone. Feel free to modify it to meet your needs (by making it a bit lighter or darker, for example).
Source V. Hartikainen
Prismatic Abstract Geometric Background derived from an image on Pixabay.
Source GDJ
No, not the band but the pattern. Simple squares in gray tones, of course.
Source Atle Mo
Derived from an image that was uploaded to Pixabay by darkmoon1968
Source Firkin
This is the remix of "blue wave-seigaiha".The image depicts a seamless pattern of the front upper part of Japanese five yen coin which is used currently.This design represents a rice with ripe golden ears.
Source Yamachem
Remixed from a design seen in 'Burghley. The Life of William Cecil', William Charlton, 1857.
Source Firkin
Because I love dark patterns, here is Brushed Alum in a dark coating.
Source Tim Ward
Derived from an image that was uploaded to Pixabay by Darkmoon1968
Source Firkin
This background image has seamless texture that resembles a surface of gray stone.
Source V. Hartikainen