Essential: a masterpiece of progressive rock music.
Portugal isn't exactly what you call a prog rock hotbed, but perhaps the most surprising figure in the prog rock scene was that country's biggest pop star, and he went by the name of José CID.
The Yardbirds are an English rock band that had a string of hits in the mid-1960s, including "For Your Love", "Over Under Sideways Down" and "Heart Full of Soul".
In Baroque opera the dramatic figure of Gaius Julius Caesar received a considerable amount of attention from librettists and composers alike, and not just from G.F. Handel working with Nicola Francesco Haym. With Giulio Cesare, a Baroque hero, Raffaele Pe creates a full recital devoted to the Ancient Roman warrior and Dictator of the Republic, drawn from operas spanning the length of the eighteenth century.
Essential: A masterpiece of rock music.
After the superb Clear album, Spirit was really flying in a class of its own which allowed them to make THE psychedelic album that not even The Beatles would managed to do. Up until this album, Spirit was one of the most advanced psych-proto-prog groups (two members were jazz veterans), but songwriting-wise they were still a step bellow Jefferson Airplane and The Beatles.
The Hollies' Greatest Hits, whose release was sparked by the 1972 success of "Long Cool Woman in a Black Dress," the band's most successful American single, contains 12 of their 14 biggest U.S. hits, 1964-1972,