Choosing a specific theologian to explore with respect to his or her doctrine of justification

Choosing a specific theologian to explore with respect to his or her doctrine of justification (or two, to compare and contrast). You might explore what Martin Luther has to say, for example, and how profoundly this doctrine permeates his thought — or, perhaps how the notion of justification “by faith alone” stood in such sharp contrast to the Catholic Church’s teaching in the early sixteenth century. At any rate, a study that is somehow historically grounded would be helpful here. 10 to 12 pages. chicago style or turabian with footnote and a complete bibliography.