For anyone not familiar with the band, their two best known songs are Whiter Shade of Pale and Conquistador.
Here is a great live version of Whiter Shade of Pale from just several years ago:
Procol Harum - A Whiter Shade Of Pale
https://www.youtube.com/watch?v=GbfyDijSHGU
Procol Harum - (Conquistador) 1972 + Lyrics - Digitally Remastered Audio:
https://www.youtube.com/watch?v=cT0loK0UEBQ
Also, a member of the band from 1967-1971 was Robin Trower. Trower went on to form his own group. Here is, by far, in many people’s opinion, their best work:
Robin Trower - Bridge of Sighs
https://www.youtube.com/watch?v=EYIwk4rHIpM
1.”Day of the Eagle” — 4:59
2.”Bridge of Sighs” — 5:05
3.”In This Place” — 4:28
4.”The Fool and Me” (Trower, James Dewar) — 3:57
5.”Too Rolling Stoned” — 7:29
6.”About to Begin” — 3:43
7.”Lady Love” (Trower, James Dewar) — 3:21
8.”Little Bit of Sympathy” — 4:20
Well, you learn something new everyday. I never knew Robin Trower was in Procul Harem..