As the original image 's page size is too large for its image size, I remixed it.
Source Yamachem
From a drawing in 'Jardyne's Wife', Charles Wills, 1891.
Source Firkin
Geometric lines are always hot, and this pattern is no exception.
Source Listvetra
A dark striped seamless pattern suitable for use as a background on websites.
Source V. Hartikainen
A monochrome pattern from a tile that can be had by selecting the rectangle in Inkscaope and using shift+alt+i
Source Firkin
A seamless background drawn in Paint.net and vectorised with Vector Magic. The starting point was a photograph of drinking straws from Pixabay.
Source Firkin
A playful triangle pattern with different shades of gray.
Source Dimitrie Hoekstra
Tile available in Inkscape using shift-alt-i on the selected rectangle
Source Firkin
Simple gray checkered lines, in light tones.
Source Radosław Rzepecki
Might not be super subtle, but quite original in its form.
Source Alex Smith
Very simple, very blu(e). Subtle and nice.
Source Seb Jachec
Prismatic Groovy Concentric Background 5 No Black
Source GDJ
Abstract Geometric Monochrome Pattern Prismatic No Background
Source GDJ