From a drawing in 'From Snowdon to the Sea. Striking stories of North and South Wales', Marie Trevelyan, 1895.
Source Firkin
Wild Oliva or Oliva Wilde? Darker than the others, sort of a medium dark pattern.
Source Badhon Ebrahim
This one takes you back to math class. Classic mathematic board underlay.
Source Josh Green
A seamless texture traced from an image on opengameart.org shared by Scouser.
Source Firkin
It almost looks a bit blurry, but then again, so are fishes.
Source Petr Šulc
Nice and simple crossed lines in dark gray tones.
Source Stefan Aleksić
Alternative colour scheme. Not a pattern for fabrics, but one produced from a jpg of a stack of fabric items that was posted on Pixabay. The tile that this is based on can be had by selecting the rectangle in Inkscape and using shift+alt+i.
Source Firkin
No, not the band but the pattern. Simple squares in gray tones, of course.
Source Atle Mo
Simple gray checkered lines, in light tones.
Source Radosław Rzepecki
Remixed from a drawing in 'Chambéry à la fin du XIVe siècle', Timoleon Chapperon, 1863.
Source Firkin
A seamless web texture with illustration of pale color stains on canvas.
Source V. Hartikainen
This pack of filters can help you adding a blocky overlay to objects. May come handy at drawing blocks of stone.
Source Lazur URH
Prismatic Geometric Tessellation Pattern 4 No Background
Source GDJ
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
Small gradient crosses inside 45-degree boxes, or bigger crosses if you will.
Source Wassim
From a drawing in 'In an Enchanted Island', William Mallock, 1892.
Source Firkin
You can never get enough of these tiny pixel patterns with sharp lines.
Source Designova
Prismatic Hypnotic Pattern No Background
Source GDJ
Alternative colour scheme for the original floral pattern.
Source Firkin
Tweed is back in style – you heard it here first. Also, the @2X version here is great!
Source Simon Leo