lotus crane #2499
 Concrete  CC 0

The image depicts a seamless pattern of the design which includes a stylized lotus and a stylized crane.I referred to the original image in a book which is into public domain.

Source Yamachem

Street Art Pattern #1196
 Concrete  CC BY-SA 3.0

Looks as if it's spray painted on the wall. You can be sure that this pattern will seamlessly fill your backgrounds on web pages.

Source V. Hartikainen

Rough Concrete Surface #1195
 Concrete  CC BY-SA 3.0

This one resembles a black concrete wall when is tiled. It should look great, at least with dark website themes.

Source V. Hartikainen

Rough Concrete Surface #1194
 Concrete  CC BY-SA 3.0

A seamless texture of a rough concrete surface.

Source V. Hartikainen

Dark Concrete Wall #1193
 Concrete  CC BY-SA 3.0

A free repetitive background with a dark concrete wall like texture. This one may be used in dark web site designs.

Source V. Hartikainen

Repeating Website Background (Blue Gray) #1192
 Concrete  CC BY-SA 3.0

The following repeating website background is colored in a blue gray color and resembles a concrete wall or something similar to it.

Source V. Hartikainen

Tileable Off-white Background #1191
 Concrete  CC BY-SA 3.0

A free tileable background colored in off-white (antique white) color.

Source V. Hartikainen

"Light Green Wall", Repeatable Texture #1190
 Concrete  CC BY-SA 3.0

Here's a repeatable texture that resembles a light green concrete wall or something similar.

Source V. Hartikainen

"Beige Wall", Tileable Background #1189
 Concrete  CC BY-SA 3.0

This beige background pattern resembles a concrete wall with engravings or something similar to it.

Source V. Hartikainen

Indian Red Web Background #1172
 Concrete  CC BY-SA 3.0

A free web background image with a seamless concrete-like texture and an Indian-red color.

Source V. Hartikainen