A seamless pattern from a tile drawn in Paint.net and vectorised in Vector Magic
Source Firkin
A comeback for you: the popular Escheresque, now in black.
Source Patten
Horizontal and vertical lines on a light gray background.
Source Adam Anlauf
Derived from a drawing in 'The Murmur of the Shells', Samuel Cowen, 1879.
Source Firkin
People seem to enjoy dark patterns, so here is one with some circles.
Source Atle Mo
Remixed from a raster on Pixabay that was uploaded by ArtsyBee.
Source Firkin
A seamless texture of an abstract wall colored in shades of light orange brown.
Source V. Hartikainen
More bright luxury. This is a bit larger than fancy deboss, and with a bit more noise.
Source Viszt Péter
Seamless Olive Green Web Background Image
Source V. Hartikainen
Wild Oliva or Oliva Wilde? Darker than the others, sort of a medium dark pattern.
Source Badhon Ebrahim
Remixed from a drawing in 'Hungary. A guide book. By several authors', 1890.
Source Firkin
It has waves, so make sure you don’t get sea sickness.
Source CoolPatterns
Number 3 in a series of 5 beautiful patterns. Can be found in colors on the submitter’s website.
Source Janos Koos
From a drawing in 'Art Embroidery', M.S. Lockwood and E. Glaister, 1878.
Source Firkin
Almost like little fish shells, or dragon skin.
Source Graphiste
Zero CC tileable bark texture, photographed and made by me. CC0
Source Sojan Janso
To get the tile this is formed from select the rectangle in Inkscape and use shift+alt+i.
Source Firkin
Remixed from a drawing in 'Analecta Eboracensia', Thomas Widdrington, 1897.
Source Firkin
A seamless paper background colored in pale yellow.
Source V. Hartikainen
Black And White Floral Pattern Background from PDP.
Source GDJ
Remixed from a drawing in 'Hungary. A guide book. By several authors', 1890.
Source Firkin
A free seamless background with pink spots.
Source V. Hartikainen
Same classic 45-degree pattern, dark version.
Source Luke McDonald
A free seamless background texture of "timber wall" (colored in dark brown).
Source V. Hartikainen