In the future (based on present/emerging tech) someone builds what is effectively a mountain bunker to survive a nuclear winter. But bunkers don't have natural light. So, the plan is to build a bunker into a mountain, and have the top (maybe side too, depending on orientation and position of bunker in relation to shape of mountain) of it glass, because sunlight is nice. But normal glass is a bad idea.
I'm curious about the possibilities and properties required to make this idea viable (even if just theoretical). For example, I am aware that manufacturers can create thick lead glass which shields from intense radiation. I am also aware that this would be heavy, and am not sure how easily it could be damaged. So what designs would be necessary? Geodesic domes? Or could the glasshouse be made into any shape? Using materials like graphene to reinforce the glass and structure, to prevent feral humans from smashing it?
Could such a glasshouse top be reinforced to the point it is resistant to intense radiation, boulders, battering rams, small arms, bombs? If not, what options are available, or theoretically would be required? Given that bullet/bomb proof glass, and radiation proof glass, are available.
Also, with regards to how useful this would be; could plants be grown under the glasshouse of leaded glass? And could the glass be heated automatically to melt any snow? Would the radiation proofing make it impossible to grow plants under it?