"Catacomb" is a burial place, and the space under Tektronix Building 13 where the skeletons of ceramic CRT molds reside is deserving of the name. Tek began development of their own CRT's in 1951, and starting molding ceramic CRT "bottles" in 1961. Since CRT production ceased in 1996, the molds have resided under Building 13, the present site of the vintageTEK Museum. More information on the use of ceramics at Tek can be found at these links:
https://vintagetek.org/ceramic-strips/
https://vintagetek.org/ceramics-role-...
https://vintagetek.org/15109-2/
https://vintagetek.org/building-a-cer...