From a drawing in 'Danmarks Riges Historie af J. Steenstrup, Kr. Erslev, A. Heise, V. Mollerup, J. A. Fridericia, E. Holm, A. D. Jørgensen', 1897.
Source Firkin
Zero CC tileable seed texture, edited by me to be seamless from a Pixabay image. CC0
Source Sojan Janso
Sometimes simple really is what you need, and this could fit you well.
Source Factorio.us Collective
Paper model of a tetrahedron. Modelo de papel de um tetraedro.
Source laobc
Seamless pattern formed from a tile that can be had by selecting the rectangle in Inkscape and using shift-alt-i.
Source Firkin
A seamless pattern formed from a rectangular tile. The tile can be retrieved by selecting the rectangle in Inkscape and using shift-alt-i.
Source Firkin
This was formed by distorting an image of a background on Pixabay.
Source Firkin
From a drawing in 'Maidenhood; or, the Verge of the Stream', Laura Jewry, 1876.
Source Firkin
Prismatic Snowflakes Pattern 2 No Background
Source GDJ
A pattern formed from a squared tile. The tile can be accessed in Inkscape by selecting the rectangle and using shift-alt-i.
Source Firkin
From a drawing in 'Two Women in the Klondike', Mary Hitchcock, 1899.
Source Firkin
A seamless pattern formed from cross 4. To get the original tile select the rectangle in Inkscape and use shift-alt-i.
Source Firkin
From a drawing in 'Cowdray: the history of a great English House', Julia Roundell, 1884.
Source Firkin
I guess this is inspired by the city of Ravenna in Italy and its stone walls.
Source Sentel
Prismatic Snowflakes Pattern No Background
Source GDJ
Inspired by a 1930s wallpaper pattern I saw on TV.
Source Firkin
A bit like smudged paint or some sort of steel, here is scribble light.
Source Tegan Male
The name Paisley reminds me of an old British servant. That’s just me.
Source Swetha
Bigger is better, right? So here you have some large carbon fiber.
Source Factorio.us Collective
It almost looks a bit blurry, but then again, so are fishes.
Source Petr Šulc
An abstract texture of water. It's not perfect, but will do. You may download if you like it.
Source V. Hartikainen
A bit of scratched up grayness. Always good.
Source Dmitry
Just the symbols of the signs of the zodiac distributed in a chequer board-like pattern
Source Firkin
Utilising a bird from s-light and some flowers from Almeidah. To get the unit tile, select the rectangle in Inkscape and use shift-alt-i.
Source Firkin
Coming in at 666x666px, this is an evil big pattern, but nice and soft at the same time.
Source Atle Mo
Remixed from a drawing in 'Chambéry à la fin du XIVe siècle', Timoleon Chapperon, 1863.
Source Firkin
8 by 8 pixels, and just what the title says.
Source pixilated