Wall Groupings are a collection of works with a related theme or color. Examples might include a series of landscapes going down a hallway. A companion piece on the end wall to direct attention into the next space. These could be all the same size or works in a variety of sizes.
The same principle of using a dominant larger piece to anchor a grouping applies. To do this, start with the largest painting and then select smaller ones to group with it. A set of 4 or 6 same-sized paintings can be grouped in two rows evenly for a formal appearance, or collaged to create a casual setting.
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