素描
冬天——夜晚——衰老和死亡（从1803年的白昼时代和人类时代循环开始）`Winter – Night – Old Age and Death (from the times of day and ages of man cycle of 1803) (circa 1803) by Caspar David Friedrich
素描
一个年轻人和一个老人的头向右看的书单`Sheet of studies with a youth and the head of an old man looking to the right (between 1520 and 1521) by Andrea del Sarto
