A gallery wall is a decorative display of art or photographs arranged in a grouping on a wall. Typically, the pieces are arranged in a cohesive way, whether that's by colour, theme, or style. Gallery walls can be composed of a variety of art pieces, such as paintings, prints, posters, photographs, or even three-dimensional objects. They are a popular way to add visual interest and personality to a room, and can be a great way to showcase a collection of artwork or photographs. Gallery walls can range in size from a small cluster of pieces to a large, sprawling arrangement that covers an entire wall.