The largest CRT TV ever made was just rediscovered.

[tooki]

big events like concerts/etc

large screens at gigs pre led, also known as  jumbotrons, were  made from some of the smallest crt screens, just lots of em.

Sooooorta.

Jumbotrons (until they migrated to LED) used flood-beam CRTs, that is, they didn’t have a beam that scanned. Each tube had a few cells (24 typically), each cell being a subpixel of sorts, with four sets of 3 color triads being grouped to be addressed as a single pixel. So yes, they were CRTs strictly speaking, but they bore little resemblance to the scanned-beam CRTs used as normal size color displays. (And amusingly, because their technology is much closer to a VFD than a Trinitron, Sony didn’t bother making them itself, but instead had them made by Futaba, the company famous for VFDs.)

See e.g.
http://lampes-et-tubes.info/cd/cd059.php?l=
https://lampes-et-tubes.info/cd/cd083.php?l=
http://lampes-et-tubes.info/cd/cd050.php?l=
https://www.industrialalchemy.org/tubepage.php?item=9&user=0
https://forum.retrotechnique.org/t/afficheurs-du-sony-jumbotron-curiosite-technique/102452