that's right: they symbols!!!
5 “Take the finest flour and bake twelve loaves of bread, using two-tenths of an ephah for each loaf. 6 Arrange them in two stacks, six in each stack, on the table of pure gold before the Lord. 7 By each stack put some pure incense as a memorial portion to represent the bread and to be a food offering presented to the Lord. 8 This bread is to be set out before the Lord regularly, Sabbath after Sabbath, on behalf of the Israelites, as a lasting covenant. 9 It belongs to Aaron and his sons, who are to eat it in the sanctuary area, because it is a most holy part of their perpetual share of the food offerings presented to the Lord.”
The bread represent the children of Israel: it is a symbol
that's why there were 12 loaves
and BTW!!! I thought you believed the The Ark of the covenant represented Mary