It sounds like you’re referencing a specific title or folder naming convention, possibly related to a niche art series, a personal archive, or a curated collection. The string “GrandMams.22.10.15.Grannies.Decadence.Art.Part...” suggests a dated (22 Oct 2015) thematic project blending elderly subjects (“grannies”), decadence (aesthetic or moral decay, often in an artistic or baroque sense), and art.