Light and airy, dense and dark, open or closed, historical or modern, fences add a sense of enclosure to the garden room or property. They can keep dogs and children inside, deer and intruders outside. They can be primarily for function or highly stylized for accent. Trellices may be attached to a wall, an arbor or a fence to add openness or to support a flowering vine. These elements can be made from wood or copper, iron or steel and can add to the uniqueness of the garden.