 Complete the following phrase:  The Baju Lamina is a chain armor that is worked in the form of a vest. The back part consists of small rectangular brass plates, the front part of brass rings. Several rectangular brass plates are attached to the brass rings, which extend from the height of the collarbone to about the lower edge of the last costal arch. The brass plates serve to reinforce the chain armor at the level of the more vulnerable chest and pelvis. The Baju Lamina has neither sleeves nor a collar. One of the earlist reference to this armor is after the 