From a drawing in 'Studies for Stories', Jean Ingelow, 1864.
Source Firkin
Prismatic Groovy Concentric Background 2 No Black
Source GDJ
Abstract Geometric Monochrome Pattern Prismatic No Background
Source GDJ
The unit cell for this seamless pattern can be had in Inkscape by selecting the rectangle and using shift+alt+i.
Source Firkin
Derived from elements found in a floral ornament drawing on Pixabay.
Source Firkin
A bit simplified version. Although it could be edited out to be simpler. Anyway, this time the tiling is converted to a pattern fill -which is using clipping for the tile's edges.
Source Lazur URH
This one has rusty dark brown texture.
Source V. Hartikainen
Bright gray tones with a hint of some metal surface.
Source Hendrik Lammers
Some more diagonal lines and noise, because you know you want it.
Source Atle Mo
Prismatic Curved Diamond Pattern No Background
Source GDJ
Dark wooden pattern, given the subtle treatment. based on texture from Cloaks.
A simple but elegant classic. Every collection needs one of these.
Source Christopher Burton
The tile this fill pattern is based on can be had by using shift+alt+i on the rectangle.
Source Firkin
CC0 and a seamless pattern from a tile drawn in Paint.net .
Source SliverKnight
I guess this is inspired by the city of Ravenna in Italy and its stone walls.
Source Sentel
Remixed from a PNG that was uploaded to Pixabay by VictorianLady
Source Firkin
That’s what it is, a dark dot. Or sort of carbon looking.
Source Tsvetelin Nikolov
Looks like an old wall. I guess that’s it then?
Source Viahorizon