It almost looks a bit blurry, but then again, so are fishes.
Source Petr Šulc
Remixed from a drawing in 'Works. Popular edition', John Ruskin, 1886.
Source Firkin
Prismatic Groovy Concentric Background 2
Source GDJ
Honestly, who does not like a little pipe and mustache?
Source Luca Errico
One of the few full-color patterns here, but this one was just too good to pass up.
Source Alexey Usoltsev
Remixed from an image that was uploaded to Pixabay by Pixeline
Source Firkin
This is so subtle you need to bring your magnifier!
Source Carlos Valdez
Derived from elements found in a floral ornament drawing on Pixabay.
Source Firkin
A background formed from an image of an old tile on the New York Metropolitan Museum of Art website. To get the base tile, select the rectangle in Inkscape and use shift-alt-i.
Source Firkin
Dead simple but beautiful horizontal line pattern.
Source Fabian Schultz