 The first regular meetings of the States-General, composed of delegates from the middle class, clergy and nobility of the Burgundian Netherlands, were held there in 1465.It was in this room that in 1515 Margaret of Austria formally relinquished her regency over the Low Countries to Charles von Habsburg, and the future emperor Charles V became the Duke of Burgundy.It was in this same room that, 40 years later, Charles V abdicated in favour of his son, King Philip II of Spain.