Number five from the same submitter, makes my job easy.
Source Dima Shiper
A background pattern inspired by designs seen in 'Burghley. The Life of William Cecil', William Charlton, 1857.
Source Firkin
To get the tile this is based on, select the rectangle in Inkscape and use shift-alt-i.
Source Firkin
I know there is one here already, but this is sexy!
Source Gjermund Gustavsen
From a drawing in 'Art Embroidery', M.S. Lockwood and E. Glaister, 1878.
Source Firkin
Remixed from a drawing in 'Kulturgeschichte der Deutschen im Mittelalter' Franz von Loeher, 1891. The unit tile can be had by selecting the rectangle in Inkscape and using shift-alt-i
Source Firkin
Nice little grid. Would work great as a base on top of some other patterns.
Source Arno Gregorian
Sharp but soft triangles in light shades of gray.
Source Pixeden
A background tile of dark textile. Made this a long time ago and just now decided to publish it.
Source V. Hartikainen
The classic notebook paper with horizontal stripes.
Source Are Sundnes
Geometric lines are always hot, and this pattern is no exception.
Source Listvetra
Snap! It’s a pattern, and it’s not grayscale! Of course you can always change the color in Photoshop.
Source Atle Mo
Light gray grunge wall with a nice texture overlay.
Source Adam Anlauf
Not a pattern for fabrics, but one produced from a jpg of a stack of fabric items that was posted on Pixabay. The tile that this is based on can be had by selecting the rectangle in Inkscape and using shift+alt+i.
Source Firkin
Dark blue concrete wall with some small dust spots.
Source Atle Mo
This one needs to be used in small areas; you can see it repeat.
Source Luca
A background pattern with green vertical stripes. A new striped background pattern. This time a green one.
Source V. Hartikainen
To get the tile this is based on, select the rectangle in Inkscape and use shift-alt-i.
Source Firkin
A seamless pattern created from a square tile. To get the tile, select the rectangle in Inkscape and use shift+alt+i.
Source Firkin
Prismatic Groovy Concentric Background 3
Source GDJ
From a drawing in 'At home', J. Sowerby, J. Crane and T. Frederick, 1881.
Source Firkin
A black tile-able background with paper-like texture.
Source V. Hartikainen
Prismatic Abstract Geometric Background 2
Source GDJ
From a drawing in 'Line and form', Walter Crane, 1914.
Source Firkin
It’s like Shine Dotted’s sister, only rotated 45 degrees.
Source mediumidee
Abstract Geometric Monochrome Pattern Prismatic No Background
Source GDJ
From a drawing in 'Sun Pictures of the Norfolk Broads', Ernest Suffling, 1892.
Source Firkin