This ons is quite old school looking. Retro, even. I like it.
Source Arno Declercq
I guess this is inspired by the city of Ravenna in Italy and its stone walls.
Source Sentel
After 1 comes 2, same but different. You get the idea.
Source Hendrik Lammers
Seamless tile drawn in Paint.net and vectorised in Vector Magic.
Source Firkin
Remixed from a drawing in 'Canadian forest industries July-December', 1915
Source Firkin
Abstract Tiled Background Extended 10
Source GDJ
A background pattern inspired by designs seen in 'Burghley. The Life of William Cecil', William Charlton, 1857.
Source Firkin
Subtle scratches on a light gray background.
Source Andrey Ovcharov
Background Wall, Art Abstract, Block Well & CC0 texture.
Source Ractapopulous
From a drawing in 'Cassell's Library of English Literature', Henry Morley, 1883.
Source Firkin
You guessed it – looks a bit like cloth.
Source Peax Webdesign
The act or state of corrugating or of being corrugated, a wrinkle; fold; furrow; ridge.
Source Anna Litvinuk
A pale yellow background pattern with vertical stripes. The stripes are partially faded. I think this background image turned out pretty well, especially those faded stripes.
Source V. Hartikainen
Seamless pattern the tile for which can be had by using shift-alt-I on the selected rectangle in Inkscape.
Source Firkin