Altars, still lifes, islands of beauty, arrangements, gateways, shrines, tokonoma, homages, we all have a word for our groups of objects we love.
Secular or religious, for worship, as offerings or love tokems, about memories, healing, spirituality ....the things which are important to us in whatever way we treat as precious. It is a universal thing.
My arrangements are intuitive and spontaneous, often created on a whim, and I find I don't want to lay too much meaning on them but want to keep them lighthearted and fun. But after they are done I find it is rather nice sometimes, to put into words what they mean to me.
Of course another word is tribute. All the railings and benches in the town today were adorned with poppies in remembrance of the ending of the First World War and in tribute to those members of the forces who died in it.