Latria Vs. Dulia and Hyperdulia
Latria is sacrificial in character, and may be offered only to God. Catholics offer other degrees of reverence to the Blessed Virgin Mary and to the Saints; these non-sacrificial types of reverence are called hyperdulia and dulia, respectively. In English, dulia is also called veneration. Hyperdulia is essentially a heightened degree of dulia provided only to the Blessed Virgin.
This distinction, written about as early as Augustine of Hippo and St Jerome, was detailed more explicitly by Thomas Aquinas in his Summa Theologiae, A.D. 1270, II II, 84, 1: "Reverence is due to God on account of His Excellence, which is communicated to certain creatures not in equal measure, but according to a measure of proportion; and so the reverence which we pay to God, and which belongs to latria, differs from the reverence which we pay to certain excellent creatures; this belongs to dulia, and we shall speak of it further on (II II 103 3)"; in this next article St. Thomas Aquinas writes: "Wherefore dulia, which pays due service to a human lord, is a distinct virtue from latria, which pays due service to the Lordship of God. It is, moreover, a species of observance, because by observance we honor all those who excel in dignity, while dulia properly speaking is the reverence of servants for their master, dulia being the Greek for servitude."
Read more about this topic: Latria