Complex sentence: Both figures' presentation is similar to the van der Paele panel; comparing the two works, Shirley Blum describes her as the embodiment of the "true" Ara coeli "... literally the tabernacle for the Body and Blood of Christ".
Split into simpler sentences: Both figures' presentation is similar to the van der Paele panel. Comparing the two works, Shirley Blum describes her as the embodiment of the "true" Ara coeli "... literally the tabernacle for the Body and Blood of Christ".