A series of 5 patterns. That’s what the P stands for, if you didn’t guess it.
Source Dima Shiper
Background Wall, Art Abstract, Watercolor Vintage style CC0 texture.
Source Ractapopulous
Stefan is hard at work, this time with a funky pattern of squares.
Source Stefan Aleksić
Remixed from an image that was uploaded to Pixabay by CatherineClennan
Source Firkin
Actually remixed from a pattern on Pixabay. But then noticed a very similar one on Openclipart.org uploaded by btj51q2.
Source Firkin
To get the tile this is based on select the rectangle in Inkscape and use shift+alt+i.
Source Firkin
From a drawing in 'Line and form', Walter Crane, 1914.
Source Firkin
Prismatic Curved Diamond Pattern 4 No Background
Source GDJ
Prismatic Curved Diamond Pattern 2 No Background
Source GDJ
Zero CC tileable ground cracked, crackled, texture, made by me.
Source Sojan Janso
A seamless pattern formed from a square tile. The tile can be retrieved by selecting the rectangle in Inkscape and using shift-alt-I.
Source Firkin
From a tile that can be had by selecting the rectangle in Inkscape and using shift+alt+i.
Source Firkin
Black brick wall pattern. Brick your site up!
Source Alex Parker
CC0 and a seamless pattern from a tile drawn in Paint.net .
Source SliverKnight
Colour version of the original pattern.
Source Firkin
To get the tile this is formed from select the rectangle in Inkscape and use shift+alt+i.
Source Firkin
From a drawing in 'Art Embroidery', M.S. Lockwood and E. Glaister, 1878.
Source Firkin
I’m not going to lie – if you submit something with the words Norwegian and Rose in it, it’s likely I’ll publish it.
Source Fredrik Scheide
Abstract Arbitrary Geometric Background derived from an image on Pixabay.
Source GDJ
A dark one with geometric shapes and dotted lines.
Source Mohawk Studios
A seamless pattern the unit cell for which can be had by selecting the rectangle in Inkscape and using shift+alt+i
Source Firkin
Prismatic Groovy Concentric Background 2
Source GDJ
Produced using the clouds, flames and glass blocks plug-ins in Paint.net and the resulting .PNG vectorised with Vector Magic.
Source Firkin
A free background image with a seamless texture of cardboard. This texture of cardboard looks quite realistic, especially when is actually tiled.
Source V. Hartikainen