From a drawing in 'At home', J. Sowerby, J. Crane and T. Frederick, 1881.
Source Firkin
Not a flat you live inside, like in the UK – but a flat piece of cardboard.
Source Appleshadow
This beige background pattern resembles a concrete wall with engravings or something similar to it.
Source V. Hartikainen
Super subtle indeed, a medium gray pattern with tiny dots in a grid.
Source Designova
To get the tile this is based on select the rectangle in Inkscape and use shift-alt-i
Source Firkin
Prismatic Geometric Pattern Background 2
Source GDJ
CC0 and a seamless pattern from a tile drawn in Paint.net .
Source SliverKnight
This one has rusty dark brown texture.
Source V. Hartikainen
Remixed from a design on Pixabay. To get the tile this is based on select the rectangle in Inkscape and use shift-alt-i.
Source Firkin
A good starting point for a cardboard pattern. This would work well in a variety of colors.
Source Atle Mo
Colour version of the original pattern.
Source Firkin
Prismatic Floral Pattern 3 Variation 3 No Background
Source GDJ
Awesome name, great pattern. Who does not love space?
Source Nick Batchelor
A seamless pattern from a tile made from a jpg on Pixabay. To get the tile select the rectangle in Inkscape and use shift-alt-i.
Source Firkin
Light gray pattern with an almost wall tile-like appearance.
Source Markus Tinner
More Japanese-inspired patterns, Gold Scales this time.
Source Josh Green
This is a more minute version of "fishnet 01".The image depicts a seamless pattern of a fishnet with a plenty of fish.It may be a lucky charm for fishermen.
Source Yamachem
The classic subtle pattern. Sort of wall/brick looking. Or moon-looking?
Source Joel Klein
By popular request, an outline version of the pentagon pattern.
Source Atle Mo
Tile available in Inkscape using shift-alt-i on the selected rectangle
Source Firkin
8 by 8 pixels, and just what the title says.
Source pixilated
The tile this is based on can be retrieved by selecting the rectangle in Inkscape and using shift+alt+i.
Source Firkin
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