Thomas Aquinas was a
Dominican. The same altarpiece also has a santo of St. Dominic in the
same roseate garment, though under a black mantle. Aquinas is sometimes
shown trampling a turbaned enemy representing theological error.
While I know of no other work representing him with a monstrance (the
object in his left hand, used in Catholic liturgy to display the
consecrated host as the body of Christ), it may be a reference to his
reputation as the theological vindicator of the doctrine of
transubstantiation and the author of two famous hymns sung on Corpus
Christi, the feast celebrating that doctrine.
is the doctrine that in the Catholic and Orthodox liturgies, the
"substance" of the bread and wine becomes the body and blood of Jesus
Christ, even though these elements retain the "accidents" -- look,
taste, texture, etc. -- of bread and wine.)
More of St. Thomas Aquinas