Here's a brown background pattern with subtle stripes. I hope you'll like the color. If not, feel free to change it using an image editor, if you know how of course. Personally, I'm using GIMP to create these backgrounds.
Source V. Hartikainen
Some rectangles, a bit of dust and grunge, plus a hint of concrete.
Source Atle Mo
Remixed from an image that was uploaded to Pixabay by CatherineClennan
Source Firkin
Sounds French. Some 3D square diagonals, that’s all you need to know.
Source Graphiste
From a drawing in 'Storia del Palazzo Vecchio in Firenze', Aurelio Gotti, 1889.
Source Firkin
Dark wooden pattern, given the subtle treatment. based on texture from Cloaks. https://cloaks.deviantart.com
Source Atle Mo
This is sort of fresh, but still feels a bit old school.
Source Martuchox
Some more diagonal lines and noise, because you know you want it.
Source Atle Mo
Remixed from a drawing in 'Hungary. A guide book. By several authors', 1890.
Source Firkin
Black & white version of a pattern that came out of playing with the 'light rays' plug-in for Paint.net
Source Firkin
Sharp diamond pattern. A small 24x18px tile.
Source Tom Neal
This was formed by distorting an image of a background on Pixabay.
Source Firkin
Carbon fiber is never out of fashion, so here is one more style for you.
Source Alfred Lee
A light gray wall or floor (you decide) of concrete.
Source Atle Mo
A beautiful dark wood pattern, superbly tiled.
Source Omar Alvarado
From a design found in 'History of the Virginia Company of London; with letters to and from the first Colony, never before printed', Edward Neill, 1869.
Source Firkin
Drawn in Paint.net using the kaleidoscope plug-in and vectorised.
Source Firkin
Background Wall, Art Abstract, Star Well & CC0 texture.
Source Ractapopulous