Some incredible vintage photos of melting and this is great evidence because these ruins will no doubt be gone now so great evidence here and no this isn’t weather erosion of from being bombed during a war because this is aftermath of the melting event and these somehow survived from being melted to rock or sand so I will call this mild melting heat damage and when this occurs it can change the properties of bricks turning them into block or cobbles or huge stones and even cook out the mortar and note how the arches survived