Book excerpt: Preliminary material /Roger Beck -- The planets and the grades: the problem of a unique order /Roger Beck -- The grade order and exoteric planetary orders: mastery of space and time /Roger Beck -- Orders on the monuments: introduction /Roger Beck -- Orders in mithraea: Sette Sfere and Sette Porte /Roger Beck -- The order of the Bologna relief: the planets and the bull-killing /Roger Beck -- Planets and zodiac: the Housesteads birth scene /Roger Beck -- The Ottaviano Zeno monument: planetary orders implicit in the row of altars; the snake-encircled figures; the ascent of souls (i); Jupiter, Sun and Saturn /Roger Beck -- The planetary order of Contra Celsum 6.22: the ascent of souls(ii); the two revolutions /Roger Beck -- Saturn's primacy: the Sun of midnight /Roger Beck -- Planetary orders and the zodiac in the Barberini fresco: the structures of genesis and apogenesis; Saturn and the snakeencircled god /Roger Beck -- the integrity ofthe Bologna relief /Roger Beck -- INDICES /Roger Beck -- LIST OF PLATES /Roger Beck -- Plates I-IV /Roger Beck.