Language Query: Are there Temporary Fixtures?

I wrote a post a few days ago in which I initially used the expression “permanent fixture”. It didn’t look quite right, so I Googled and found it was indeed a common phrase.

But, what is the contrast? Are there temporary fixtures with which we are contrasting permanent fixtures? I ended up editing to “fixtures” alone and wonder whether that shouldn’t become a habit.

Anyone know the origin of the phrase or want to offer an opinion on its redundancy or merit?