Nicely crafted paper pattern, although a bit on the large side (500x593px).
Source Blaq Annabiosis
From a drawing in 'Chambéry à la fin du XIVe siècle', Timoleon Chapperon, 1863.
Source Firkin
Utilising some flowers from Almeidah. To get the unit tile, select the rectangle in Inkscape and use shift-alt-i.
Source Firkin
Formed from a tile based on a drawing from 'Viaggi d'un artista nell'America Meridionale', Guido Boggiani, 1895.
Source Firkin
Could be paper, could be a Polaroid frame – up to you!
Source Chaos
Remixed from a PNG that was uploaded to Pixabay by gingertea
Source Firkin
The original enhanced with some gradients.
Source Firkin
Prismatic Hypnotic Pattern 2 No Background
Source GDJ
To get the tile this is based on, select the rectangle in Inkscape and use shift-alt-i.
Source Firkin
Coming in at 666x666px, this is an evil big pattern, but nice and soft at the same time.
Source Atle Mo
The image depicts a seamless pattern of pine tree leaves.
Source Yamachem
This is the third pattern called Dark Denim, but hey, we all love them!
Source Brandon Jacoby
Formed by distorting an image on Pixabay that was uploaded by gustavorezende. To get the tile this is based on, select the rectangle in Inkscape and use shift+alt+i.
Source Firkin
Remixed from a drawing in 'Hungary. A guide book. By several authors', 1890.
Source Firkin
This was formed by distorting an image of a background on Pixabay.
Source Firkin
Classic 45-degree pattern, light version.
Source Luke McDonald
Just to prove my point, here is a slightly modified dark version.
Source Atle Mo
From a drawing in 'Studies for Stories', Jean Ingelow, 1864.
Source Firkin
Submitted by DomainsInfo – wtf, right? But hey, a free pattern.
Source DomainsInfo
Basket Fibers, Basket Texture, Braid Background style CC0 texture.
Source 1A-Photoshop