Seaside Royal Windows from universe The Little Mermaid, is an item of furniture that can be arranged and positioned in furniture placement mode. It's purchasable at Scrooge's Store. Upon acquisition, it becomes part of the Dreamlight Valley Furniture Sets Collection, with additional units available for reorder from Scrooge
Don't hesitate to save the ones you have to make them disappear from your list.
The Little Mermaid