Not just a song that can be found in the archives, but one that almost everyone can hum, even today.
(Somebody asked what was meant by "today's...." Throw whatever you want out, somebody tossed out "Love me tender" as being a tune from in the 1860s.)
One thing people might not realise, is that memorable old music can come and go. Until someone recorded a successful rendition in the 60's, Cannon in D had been forgotten for centuries. Now it's almost synonymous with wedding music, and seems completely timeless.
It's possible everyone will be crazy about 1919's El sombrero de tres picos in 2450, and (with this all being indistinct distant history) will picture us in 2024 playing it on boombox at a 2050's-style holo-orgy.
B.P.E. by Girls5Eva I had this song in my head all day yesterday. https://open.spotify.com/track/7jYbX7gU0Pe2b0nZR7OSH5?si=P9aE_s8ER3unRraCRrV0dA Surely it will be known by all in the future... hehe.