From a drawing in 'A Life Interest', Mrs Alexander, 1888.
Source Firkin
Another fairly simple design drawn in Paint.net and vectorized in Inkscape.
Source Firkin
Prismatic Curved Diamond Pattern 2 No Background
Source GDJ
"Beige Stone", Tileable Texture.
Source V. Hartikainen
As the original image 's page size is too large for its image size, I remixed it.
Source Yamachem
From a drawing in 'Art Embroidery', M.S. Lockwood and E. Glaister, 1878.
Source Firkin
Sharp pixel pattern looking like some sort of fabric.
Source Dmitry
Luxury pattern, looking like it came right out of Paris.
Source Daniel Beaton
A textured blue background pattern with vertical stripes.
Source V. Hartikainen
A grid of squares with green colours. Since the colours are randomly distributed it is automatically seamless.
Source Firkin
Background Wall, Art Abstract, Block Well & CC0 texture.
Source Ractapopulous
A good starting point for a cardboard pattern. This would work well in a variety of colors.
Source Atle Mo
Zerro CC tillable texture of stones photographed and made by me. CC0
Source Sojan Janso
The tile this is based on can be retrieved by selecting the rectangle in Inkscape and using shift+alt+i.
Source Firkin
To get the tile this is based on select the rectangle in Inkscape and use shift-alt-i
Source Firkin
Cubes as far as your eyes can see. You know, because they tile.
Source Jan Meeus
An abstract texture of black metal pipes (seamless).
Source V. Hartikainen
The act or state of corrugating or of being corrugated, a wrinkle; fold; furrow; ridge.
Source Anna Litvinuk
Remixed from a PNG that was uploaded to Pixabay by k_jprather
Source Firkin
Light honeycomb pattern made up of the classic hexagon shape.
Source Federica Pelzel
CC0 and a seamless pattern from a tile drawn in Paint.net .
Source SliverKnight