The exact role of the royal architect James of St George in the construction is still being argued by many academics. The same with the influence of his native county of Savoy on the designs. However, the main sources indicate that he played a key role in its construction. They even described him as: “Magistro Jacobo de sancto Georgio, Magistro operacionum Regis in Wallia”. It means “Master James of Saint George, Master of the King’s Works in Wales.”