A mid-tone gray pattern with some cement looking texture.
Source Hendrik Lammers
Alternative colour scheme to the original.
Source Firkin
Bumps, highlight and shadows – all good things.
Source Badhon Ebrahim
Prismatic Geometric Tessellation Pattern 3 No Background
Source GDJ
From a drawing in 'Uit de geschiedenis der Heilige Stede te Amsterdam', Yohannes Sterck, 1898.
Source Firkin
Adapted heavily from a JPG that was uploaded to Pixabay by Viscious-Speed.
Source Firkin
Not so subtle. These tileable wood patterns are very useful.
Source Elemis
This is sort of fresh, but still feels a bit old school.
Source Martuchox
A topographic map like this has actually been requested a few times, so here you go!
Source Sam Feyaerts
Prismatic Geometric Pattern Background
Source GDJ
Remixed from a design seen in 'Burghley. The Life of William Cecil', William Charlton, 1857.
Source Firkin
A free tileable background colored in off-white (antique white) color.
Source V. Hartikainen
To get the tile this is based on select the rectangle in Inkscape and use shift+alt+i.
Source Firkin
Everyone loves a diamond, right? Make your site sparkle.
Source AJ Troxell
A seamless pattern with a unit cell drawn as a bitmap in Paint.net and vectorized in Vector Magic.
Source Firkin
Remixed from a raster on Pixabay, that was uploaded by ArtsyBee.
Source Firkin
Prismatic Hypnotic Pattern 2 No Background
Source GDJ
Super simple but very nice indeed. Gray with vertical stripes.
Source Merrin Macleod
Derived from elements found in a floral ornament drawing on Pixabay.
Source Firkin