With the installment of Byzantine Emperor Kantakouzenos, The Byzantine Civil War begins. Lasting until 1347, his ascension was questioned by so-call “Pretender”, John V. Losing thousands of men and territory, Kantakouzenos will be allowed to retire to a Monastery (and live out the remainder of his life).
The Key can symbolize either Religious affiliations or one who provides “security”. They are considered a Charge. Normally, they are colored gold (and are also shown with a Lock).