What makes Citadel by Starcastle notable?

'Citadel' stands out due to its critical reception, often compared to the works of Yes and Genesis. Though it didn't achieve significant commercial success on the charts, it has garnered appreciation over the years for its intricate musicianship and vocal harmonies, solidifying Starcastle's place in the progressive rock movement. Released in 1977, 'Citadel' is Starcastle's second studio album, following their self-titled debut in 1976. The band was firmly establishing its identity within the progressive rock genre, noted for its ambitious sound and complex compositions. At this point, they were building upon the success of their debut while facing the challenge of evolving their musical style.