From a drawing in 'Gately's World's Progress', Charles Beale, 1886.
Source Firkin
Geometric triangles seem to be quite hot these days.
Source Pixeden
Fix side and a seamless pattern formed from circles.
Source SliverKnight
Retro Circles Background 5 No Black
Source GDJ
Prismatic Groovy Concentric Background 3
Source GDJ
A light gray background pattern with seamless fabric-like texture and almost unnoticeable stripes.
Source V. Hartikainen
To get the tile this is based on select the rectangle in Inkscape and use shift-alt-i
Source Firkin
Sharp pixel pattern, just like the good old days.
Source Paridhi
From a drawing in 'Handbook of the excursions proposed to be made by the Lincoln Diocesan Architectural Society, on the 27th and 28th of May, 1857', Edward Trollope, 1857.
Source Firkin
Remixed from a drawing in 'The March of Loyalty', Letitia MacClintock, 1884.
Source Firkin
Geometric lines are always hot, and this pattern is no exception.
Source Listvetra
A seamless green background texture. The image is distributed under a Creative Commons License (like all of the images here).
Source V. Hartikainen
It has waves, so make sure you don’t get sea sickness.
Source CoolPatterns
A car pattern?! Can it be subtle? I say yes!
Source Radosław Rzepecki
ZeroCC tileable moss texture, photographed and made by me. CC0
Source Sojan Janso
From a drawing in 'In an Enchanted Island', William Mallock, 1892.
Source Firkin
8 by 8 pixels, and just what the title says.
Source pixilated
From a drawing in 'Bond Slaves. The story of a struggle.', Isabella Varley, 1893.
Source Firkin
Seamless , tileable CC-0 texture. Created by my own, feel free to use wherever you want!
Source Linolafett