Petrus Castrus Was A Progressive Rock Band From Portugal That Released Two Albums Mestre 1973 And Ascenção E Queda 1978 . Mestre Was Banned Soon After Its Release For Controversial Lyrics Speaking Against The Current Establishment. The Album Is Now Regarded As A Highly Influential Underground Progressive Gem. You Can Contact The Band Personally Trough Their Facebook Http //www.Facebook.Com/PetrusCastrus