Banners (decorative)

Banners are a Decorative Furniture item that can be placed on ceilings. They come in red, green, blue, and yellow varieties. All banner colors are crafted with Silk. They can only be placed on the underside of blocks, not wooden platforms. Despite being multi-colored, they do not require any dyes to craft.

Note that banners occupy space like other types of furniture, and thus cannot overlap with other furniture. That is, you can't put a banner "behind" another piece of furniture.

Non-craftable banners were added in 1.2 and are found in separate areas:

The banners in the dungeon indicate what sort of mobs will spawn there in hardmode

Dungeon:
 * Necromatic Sign
 * Diabolic Sigil
 * Molten Legion Flag

Floating Island:
 * Gravity Banner
 * Sun Banner
 * World Banner

Underworld:
 * Obsidian Watcher Banner
 * Helltower Banner
 * Lava Erupts Banner

Trivia

 * Banners are the same color of the Teams in multiplayer.

History
Bannière Знамя