Remixed from a drawing in 'The March of Loyalty', Letitia MacClintock, 1884.
Source Firkin
Three shades of gray makes this pattern look like a small carbon fiber surface. Great readability even for small fonts.
Source Atle Mo
A version without colours blended together to give a different look.
Source Firkin
From an image on opengameart.org shared by rubberduck.
Source Firkin
Derived from an image that was uploaded to Pixabay by pugmom40
Source Firkin
I’m starting to think I have a concrete wall fetish.
Source Atle Mo
From a drawing in 'Les Chroniqueurs de l'Histoire de France depuis les origines jusqu'au XVIe siècle', Henriette Witt, 1884.
Source Firkin
Like the name suggests, this background image consists of a pattern of dark bricks. It may be an option for you, if you are looking for something that looks like a brick wall for use as a background on web pages. It's not a masterpiece, but looks pretty nice when is tiled.
Source V. Hartikainen
A comeback for you: the popular Escheresque, now in black.
Source Patten
A light brushed aluminum pattern for your pleasure.
Source Tim Ward
Sounds French. Some 3D square diagonals, that’s all you need to know.
Source Graphiste
Vertical lines with a bumpy, yet crisp, feel to it.
Source Raasa
Vector version of a png that was uploaded to Pixabay by pencilparker
Source Firkin
Dark, square, clean and tidy. What more can you ask for?
Source Jaromír Kavan
Remixed from a drawing in 'Maidenhood; or, the Verge of the Stream', Laura Jewry, 1876.
Source Firkin
Prismatic Geometric Tessellation Pattern No Background
Source GDJ
Seamless pattern the tile for which can be had by using shift-alt-I on the selected rectangle in Inkscape.
Source Firkin