From a drawing in 'Royal Ramsgate', James Simson, 1897.
Source Firkin
Wild Oliva or Oliva Wilde? Darker than the others, sort of a medium dark pattern.
Source Badhon Ebrahim
From a drawing in 'Heroes of North African Discovery', Nancy Meugens, 1894.
Source Firkin
Washi (和紙?) is a type of paper made in Japan. Here’s the pattern for you!
Source Carolynne
Prismatic Abstract Geometric Background 4
Source GDJ
Background Wall, Art Abstract, Star Well & CC0 texture.
Source Ractapopulous
Sharp pixel pattern looking like some sort of fabric.
Source Dmitry
This is so subtle I hope you can see it! Tweak at will.
Source Alexandre Naud
Prismatic Polka Dots Mark II 3 No Background
Source GDJ
A pattern derived from repeating unit cells each derived from part of a mosaic in paint.net. The starting point for the mosaic was a picture of some prawns!
Source Firkin
Dark, square, clean and tidy. What more can you ask for?
Source Jaromír Kavan
Some more diagonal lines and noise, because you know you want it.
Source Atle Mo
Derived from an image that was uploaded to Pixabay by Kaz
Source Firkin
Sometimes you just need the simplest thing.
Source Fabricio
From a drawing in 'Line and form', Walter Crane, 1914.
Source Firkin
Zero CC tileable hard cover green book, scanned and made by me. CC0
Source Sojan Janso
Not sure if this is related to the Nami you get in Google image search, but hey, it’s nice!
Source Dertig Media
A seamless pattern of dark bricks. Maybe it's not very realistic, but it looks good in my opinion.
Source V. Hartikainen
From a drawing in 'Resa i Afrika, genom Angola, Ovampo och Damaraland', P. Moller, 1899.
Source Firkin
Remixed from a drawing in 'Chambéry à la fin du XIVe siècle', Timoleon Chapperon, 1863.
Source Firkin
Prismatic Curved Diamond Pattern 6 No Background
Source GDJ