Only in the way I “experienced” 300+C by jumping through a bonfire. You never reach a true equilibrium in a Sauna that hot, but you can reach an equilibrium in 50C when the humidity is low enough.
https://brickcollecting.com/merwin.htm
Yeah, I found some cool bricks and wondered if brick collecting was a thing.
Ones made by prisoners. One with a nice glaze etc.