When I was but a wee thing, didn't know "Porgi amor" from Porgy and Bess, one of my role models in freaking the fuck out about opera--sort of incidentally the first person to play me Rosa Ponselle--was a delightful fellow who shares my first name (well, my real one) and whose uberdiva was Sylvia Sass. I think fondly of her both because he was so into her, went to a full run of her Toscas I think, and also because I've always liked her lispy lunatic of an Elvira on that one Don Giovanni. I don't know much of the rest of her output, but I'm curious whether she blew it out altogether or just never completely caught on--I think she'd have been pretty young still in the 90's and I'm pretty sure she wasn't singing anywhere, at least in the States.
A very devoted fan on YouTube seems to have posted rather a lot of her work, so here's a clip I liked. Talk of Norma is in the air anyway, these days, isn't it?