From a drawing in 'Uit de geschiedenis der Heilige Stede te Amsterdam', Yohannes Sterck, 1898.
Source Firkin
A bit like some carbon, or knitted netting if you will.
Source Anna Litvinuk
Seamless pattern the tile for which can be had by using shift-alt-I on the selected rectangle in Inkscape.
Source Firkin
Prismatic Abstract Background Design No Black
Source GDJ
Original minus the background
Source Firkin
Sounds French. Some 3D square diagonals, that’s all you need to know.
Source Graphiste
Derived from a corner decoration itself found as a jpg on Pixabay.
Source Firkin
This was formed by distorting an image of a background on Pixabay.
Source Firkin
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
Nasty or not, it’s a nice pattern that tiles. Like they all do.
Source Badhon Ebrahim
From a drawing in 'At home', J. Sowerby, J. Crane and T. Frederick, 1881.
Source Firkin
From a drawing in 'Studies for Stories', Jean Ingelow, 1864.
Source Firkin
Uses spirals from Pixabay. To get the basic tile select the rectangle in Inkscape and use shift+alt+i
Source Firkin
After 1 comes 2, same but different. You get the idea.
Source Hendrik Lammers
Horizontal and vertical lines on a light gray background.
Source Adam Anlauf
A new one called white wall, not by me this time.
Source Yuji Honzawa
Prismatic Curved Diamond Pattern 6 No Background
Source GDJ