From a drawing in 'Uit de geschiedenis der Heilige Stede te Amsterdam', Yohannes Sterck, 1898.
Source Firkin
Remixed from a design seen on Pixabay. The basic tile can be had by selecting the rectangle in Inkscape and using shift+alt+i.
Source Firkin
Prismatic Curved Diamond Pattern 5 No Background
Source GDJ
It’s an egg, in the form of a pattern. This really is 2012.
Source Paul Phönixweiß
Zero CC tileable ground (#2) cracked, crackled texture, made by me. CC0
Source Sojan Janso
The image is a seamless pattern of a fishnet.
Source Yamachem
Drawn in Paint.net and vectorised in Vector Magic.
Source Firkin
This was formed by distorting an image of a background on Pixabay.
Source Firkin
This seamless web background texture looks like gray stone. It's great for using as a background image on web pages, or on some of their elements. Anyway, I hope you will find use for it.
Source V. Hartikainen
Prismatic Hexagonalist Pattern No Background
Source GDJ
A background pattern with wavy green vertical stripes. This one has green stripes on a white background. Download if you like it.
Source V. Hartikainen
Prismatic Abstract Geometric Background 4
Source GDJ
Kaleidoscope Prismatic Abstract No Background
Source GDJ
ZeroCC tileabel stone granite texture, edited from pixabay. CC0
Source Sojan Janso
Submitted as a black pattern, I made it light and a few steps more subtle.
Source Andy
A hint of orange color, and some crossed and embossed lines.
Source Adam Anlauf
From a drawing in 'Maidenhood; or, the Verge of the Stream', Laura Jewry, 1876.
Source Firkin
To get the tile this is based on select the rectangle in Inkscape and use shift-alt-i
Source Firkin
This makes me wanna shoot some pool! Sweet green pool table pattern.
Source Caveman