Flashback: Led Zeppelin Rock London's Earls Court for Nearly Four Hours Flashback: Led Zeppelin Rock London's Earls Court for Nearly Four Hours The sound is pristine on this 1975 bootleg, which is the longest recorded show of Led Zeppelin's career Andy Greene, provided by FacebookTwitterEmail There’s no one definitive Led Zeppelin concert that fans point to as their finest moment. Some dig late-period gigs like the L.A. Forum 1977 or Knebworth 1979, while others point to early ones like the Texas International Pop Festival of 1969 or the Royal Albert Hall 1970. They’re one of the most bootlegged bands of the Seventies, so the selection is vast.