"Generate an image of a royal coat of arms, specifically the Arms of the House of Saxe-Coburg and Gotha, with a German architectural style, set against a backdrop of the Duchy of Saxe-Coburg and Gotha, incorporating symbols of Protestantism and Roman Catholicism, with the motto 'Fideliter et constanter' inscribed, representing the historical royal house founded in 1826 by Ernest I, Duke of Saxe-Coburg and Gotha."