Remixed from a drawing in 'Line and form', Walter Crane, 1914.
Source Firkin
This pattern comes in orange, and it looks as if it is "made of glass".
Source V. Hartikainen
Oh yes, it happened! A pattern in full color.
Source Atle Mo
Hexagonal dark 3D pattern. What more can you ask for?
Source Norbert Levajsics
Prismatic Geometric Pattern Background
Source GDJ
Number five from the same submitter, makes my job easy.
Source Dima Shiper
A seamless pattern from a tile drawn in Paint.net and vectorised in Vector Magic
Source Firkin
From a drawing in 'Art Embroidery', M.S. Lockwood and E. Glaister, 1878.
Source Firkin
A free seamless background texture of "timber wall" (colored in dark brown).
Source V. Hartikainen
From a drawing in 'Artists and Arabs', Henry Blackburn, 1868
Source Firkin
Simple gray checkered lines, in light tones.
Source Radosław Rzepecki
A seamless pattern formed from a square tile. The tile can be retrieved by selecting the rectangle in Inkscape and using shift-alt-I. Version with black background.
Source Firkin
Super detailed 16×16 tile that forms a beautiful pattern of straws.
Source Pavel
Farmer could be some sort of fabric pattern, with a hint of green.
Source Fabian Schultz
Prismatic Geometric Tessellation Pattern 4 No Background
Source GDJ
Background formed from the original with an emboss effect.
Source Firkin
Prismatic Isometric Cube Extra Pattern No Background
Source GDJ
The Grid. A digital frontier. I tried to picture clusters of information as they traveled through the computer.
Source Haris Šumić
Prismatic Groovy Concentric Background 3 No Black
Source GDJ
People seem to enjoy dark patterns, so here is one with some circles.
Source Atle Mo
Zerro CC tillable texture of stones photographed and made by me. CC0
Source Sojan Janso