A seamless texture traced from an image on opengameart.org shared by Scouser.
Source Firkin
From a drawing in 'Cassell's Library of English Literature', Henry Morley, 1883.
Source Firkin
You just can’t get enough of the fabric patterns, so here is one more for your collection.
Source Krisp Designs
To get the tile this is based on, select the rectangle in Inkscape and use shift+alt+i.
Source Firkin
Just what the name says, paper fibers. Always good to have.
Source Heliodor jalba
Not so subtle. These tileable wood patterns are very useful.
Source Elemis
With a name like this, it has to be hot. Diagonal lines in light shades.
Source Isaac
Remixed from a drawing in 'The Canadian horticulturist', 1892
Source Firkin
Looks like an old wall. I guess that’s it then?
Source Viahorizon
CC0 and a seamless pattern from a tile drawn in Paint.net .
Source SliverKnight
This is the remix of "Strawberry Pattern Background" uploaded by "GDJ". Thanks. I realigned strawberries so as to get seamless and changed the BG color.
Source Yamachem
Prismatic Geometric Pattern Background
Source GDJ
Abstract Stars Geometric Pattern Prismatic No Background
Source GDJ
A seamless texture traced from an image on opengameart.org shared by Scouser.
Source Firkin
Prismatic Geometric Pattern Background 2
Source GDJ
Background Wall, Art Abstract, Block Well & CC0 texture.
Source Ractapopulous
Colour version that is close to the original drawing uploaded to Pixabay by pencilparker.
Source Firkin
Nicely crafted paper pattern, although a bit on the large side (500x593px).
Source Blaq Annabiosis
Seamless Prismatic Pythagorean Line Art Pattern No Background. A seamless pattern that includes the original tile (go to Objects / Pattern / Pattern To Objects in Inkscape's menu to extract it).
Source GDJ
Design drawn in Paint.net, vectorised using Vector Magic and finished in Inkscape.
Source Firkin
Submitted as a black pattern, I made it light and a few steps more subtle.
Source Andy
From a drawing in 'Hubert Montreuil, or the Huguenot and the Dragoon', Francisca Ouvry, 1873.
Source Firkin
This was formed by distorting an image of a background on Pixabay.
Source Firkin