From a drawing in 'A Guide to the Guildhall of the City of London', John Baddeley, 1898.
Source Firkin
Formed by heavily distorting part of a an image of a fish uploaded to Pixabay by GLady
Source Firkin
Pattern #100! A black classic knit-looking pattern.
Source Factorio.us Collective
Colour version that is close to the original drawing uploaded to Pixabay by pencilparker.
Source Firkin
From an image on opengameart.org shared by rubberduck.
Source Firkin
Submitted by DomainsInfo – wtf, right? But hey, a free pattern.
Source DomainsInfo
A seamless light gray paper texture with horizontal double lines.
Source V. Hartikainen
CC0 and a seamless pattern from a tile drawn in Paint.net .
Source SliverKnight
Background Wall, Art Abstract, Blue Well & CC0 texture.
Source Ractapopulous
ZeroCC tileable stone texture, edited from pixabay, CC0
Source Sojan Janso
The tile can be had by using shift+alt+i on the selected rectangle in Inkscape
Source Firkin
A yellow tiled background... Blurriness, bokeh effect and rectangles pattern in one mix.
Source V. Hartikainen
From a drawing in 'In an Enchanted Island', William Mallock, 1892.
Source Firkin
More leather, and this time it’s bigger! You know, in case you need that.
Source Elemis
A seamless web background with texture of aged grid paper.
Source V. Hartikainen
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
A seamless green background texture. The image is distributed under a Creative Commons License (like all of the images here).
Source V. Hartikainen