This could be a hippy vintage wallpaper.
Source Tileable Patterns
The classic notebook paper with horizontal stripes.
Source Are Sundnes
ZeroCC tileable mossy (lichen) stone texture, edited from pixabay. CC0
Source Sojan Janso
Dark, crisp and subtle. Tiny black lines on top of some noise.
Source Wilmotte Bastien
Honestly, who does not like a little pipe and mustache?
Source Luca Errico
Light gray pattern with an almost wall tile-like appearance.
Source Markus Tinner
A browner version of the original weathered fence texture.
Source Firkin
Tiny circle waves, almost like the ocean.
Source Sagive
From a drawing in 'In an Enchanted Island', William Mallock, 1892.
Source Firkin
From a drawing in 'Handbook of the excursions proposed to be made by the Lincoln Diocesan Architectural Society, on the 27th and 28th of May, 1857', Edward Trollope, 1857.
Source Firkin
Nicely crafted paper pattern, although a bit on the large side (500x593px).
Source Blaq Annabiosis
Remixed from a drawing in 'Works. Popular edition', John Ruskin, 1886.
Source Firkin
A seamless texture traced from an image on opengameart.org shared by Scouser.
Source Firkin
This one is super crisp at 2X. Lined paper with some dust and scratches.
Source HQvectors
Recreated from a pattern found in 'Az Osztrák-Magyar Monarchia irásban és képben', 1882. To get the tile this is based on select the rectangle in Inkscape and use shift+alt+i.
Source Firkin
Medium gray pattern with small strokes to give a weave effect.
Source Catherine
Tiny little fibers making a soft and sweet look.
Source Badhon Ebrahim
Derived from elements found in a floral ornament drawing on Pixabay.
Source Firkin
Number 2 in a series of 5 beautiful patterns. Can be found in colors on the submitter’s website.
Source Janos Koos
Used correctly, this could be nice. Used in a bad way, all hell will break loose.
Source Atle Mo