Here's an excerpt from an article by Peter Brown, who served as executive director of Apple Corps, The Beatles’ holding company, from 1968-70...
On January 30 1969, The Beatles — the band that had reshaped popular music and culture in a creative arc of only eight years (and with whom I had worked for that entire dizzying period) — played an impromptu show in London, immortalised as “the rooftop concert”.
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https://www.ft.com/content/dd8921be-1d88-11e9-b126-46fc3ad87c65