Ключевые слова: ages, art, background, battlement, brick, brown, bush, castle, castle sforzesco, circular, construction, curved, defence, defensive, dirty, europe, facade, face, front, glass, grass, grate, green, grey, history, hole, incision, inclined, iron, line, marble, mediaeval, metal, middle, milan, old, protection, rock, rose window, spot, stone, top, triangular, war, window,