Milanese Cuirass.
The pictures above show the Milanese breast and backplate assemblies. Together these pieces of armour are called a cuirass. Milanese and English armour of the 15th century are unique from the armour of other regions and eras in that the cuirass hinges on the side. The armour is put on by unbuckling the straps and stepping in from the side. The vast majority of armour from other regions of the world is designed so that the breastplates and backplates are separate and can be placed on the Knight's back and chest then buckling the shoulders and side straps. A Milanese cuirass is difficult to custom fit and polish (after assembly) because of this design.
