From a drawing of the coat of arms of the Ottoman Empire on Wikimedia.
Source Firkin
Did some testing with Repper Pro tonight, and this gray mid-tone pattern came out.
Source Atle Mo
Prismatic Chevrons Pattern 5 With Background
Source GDJ
A nice and simple gray stucco material. Great on its own, or as a base for a new pattern.
Source Bartosz Kaszubowski
Continuing the geometric trend, here is one more.
Source Mike Warner
A dark one with geometric shapes and dotted lines.
Source Mohawk Studios
This pack of filters can help you adding a blocky overlay to objects. May come handy at drawing blocks of stone.
Source Lazur URH
Geometric lines are always hot, and this pattern is no exception.
Source Listvetra
Here's an yet another seamless note paper texture for use as a background on websites.
Source V. Hartikainen
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
The unit cell for this seamless pattern can be had in Inkscape by selecting the rectangle and using shift+alt+i.
Source Firkin
ZeroCC tileable moss texture, photographed and made by me. CC0
Source Sojan Janso
Have you wondered about how it feels to be buried alive? Here is the pattern for it.
Source Hendrik Lammers
Nasty or not, it’s a nice pattern that tiles. Like they all do.
Source Badhon Ebrahim
This was formed by distorting an image of a background on Pixabay.
Source Firkin
The tile this is formed from can be retrieved in Inkscape by selecting the rectangle and using shift+alt+i
Source Firkin
Not the most creative name, but it’s a good all-purpose light background.
Source Dmitry
Black And White Floral Pattern Background Inverse
Source GDJ
Lovely pattern with splattered vintage speckles.
Source David Pomfret
Remixed from a JPG that was uploaded to Pixabay by theasad121
Source Firkin
Prismatic Groovy Concentric Background 3 No Black
Source GDJ
To get the tile this is based on select the rectangle in Inkscape and use shift+alt+i.
Source Firkin
A pattern formed from repeated instances of corner decoration 8. To get the basic tile select the rectangle in Inkscape and use shift+alt+i
Source Firkin
Sort of like the Photoshop transparent background, but better!
Source Alex Parker