A smooth mid-tone gray, or low contrast if you will, linen pattern.
Source Jordan Pittman
I guess this is inspired by the city of Ravenna in Italy and its stone walls.
Source Sentel
Prismatic Rounded Squares Grid 3 No Background
Source GDJ
A seamless pattern formed from a square tile. The tile can be retrieved by selecting the rectangle in Inkscape and using shift-alt-I. Version with black background.
Source Firkin
From a drawing in 'Art Embroidery', M.S. Lockwood and E. Glaister, 1878.
Source Firkin
A seamless background pattern with a texture of wood planks. This wood background pattern has vertically arranged planks. You may try to rotate it 90°, to see how it will look like when the wood planks are arranged horizontally.
Source V. Hartikainen
Seamless pattern formed from a tile that can be had by selecting the rectangle in Inkscape and using shift+alt+i
Source Firkin
Dare I call this a «flat pattern»? Probably not.
Source Dax Kieran
To celebrate the new feature, we need some sparkling diamonds.
Source Atle Mo
A seamless pattern from a tile made from a jpg on Pixabay. To get the tile select the rectangle in Inkscape and use shift-alt-i.
Source Firkin
Prismatic Curved Diamond Pattern 2 No Background
Source GDJ
From a drawing in 'Royal Ramsgate', James Simson, 1897.
Source Firkin
Zero CC tileable moss or lichen covered stone texture, edited from pixabay. CC0
Source Sojan Janso
Super detailed 16×16 tile that forms a beautiful pattern of straws.
Source Pavel
Nice and simple crossed lines in dark gray tones.
Source Stefan Aleksić
Used a cherry by doctormo to make this seamless pattern
Source Firkin
More Japanese-inspired patterns, Gold Scales this time.
Source Josh Green
Psychedelic Geometric Background No Black
Source GDJ
Remixed from a raster on Pixabay, that was uploaded by ArtsyBee.
Source Firkin
With a name this awesome, how can I go wrong?
Source Nikolay Boltachev