The first work attributed to Rembrandt was painted in 1627, when he was twenty years old, "St. Paul in Prison," showing care in detail and richness in color. During the next two years, he made etchings of himself and of his mother, who appears to have been his ideal.

His first oil paintings were done in 1630; one, now lost, showing a philosopher in a grotto; and the "Bust of an Old Man," which, says Prof. John W. Mollett of France, in his Life of Rembrandt, "is the most interesting of all the Rembrandts in the Cassel Gallery, from the fact that it first displayed his knowledge of the great secret, which he subsequently so wonderfully developed, of concentrating light upon the heads of his portraits. He painted other old men's heads at the same date, and all are remarkable for indefatigable elaboration and care. In this same year, Rembrandt produced more than thirty etchings."

After several years passed at Leyden, Rembrandt removed his studio to Amsterdam, a rich and flourishing city of one hundred thousand people at that time, whither his fame had preceded him. He hired apartments over a shop on the Bloemgracht, a quay in the western part of the city, where numerous pupils soon came to him, and commissions from the wealthy. One of his first principal works was "The Presentation in the Temple," now in the museum at the Hague. "The picture," says Mr. Sweetser, "presents a great temple interior, with groups of citizens and prelates, and, in the centre, massed under a bright light, the Holy Family, with the richly robed Simeon adoring the child Jesus. It is full of the strong shades and contrasting brightness of the new school of art, replete with poetic power and fresh personality, warm in golden lights, and in certain parts showing a rare minuteness of finish in detail. This subject was always a favorite with Rembrandt, and several other paintings thereof are preserved, together with numerous sketches and engravings, showing the venerable Simeon in the Temple at Jerusalem.

"The 'Susannah' was executed during the same year, and is now at the Hague. The shrinking, naked figure of the fair bather, though lacking in statuesque beauty and symmetry, is thoroughly natural and tender, palpitating with life, and lighted with a warm and harmonious glow. This, also, was a favorite theme with Rembrandt, and conveniently replaced the Diana and Actæon of the classical painters with a subject not less alluring, and perhaps more permissible."

Rembrandt also painted "St. Jerome," now at Aix-la-Chapelle, the lost pictures of "Lot and his Daughters," and the "Baptism of the Eunuch;" "The Young Man," now at Windsor; the "Prophetess Anna," in the Oldenbourg Gallery; the "Portrait of a Man," in the Brunswick Museum; and about forty etchings, among them two portraits of his mother, several of himself; the "Bath of Diana," and the Meeting of "Danaë and Jupiter."

In 1632, Rembrandt painted his famous "School of Anatomy," now at the Hague, for which the Dutch government, two centuries later, gave thirty-two thousand florins.

"This picture represents the celebrated anatomist, Nicolaus Tulp, a friend and patron of Rembrandt, in a vaulted saloon, engaged in explaining the anatomy of the arm of a corpse. He wears a black cloak with a lace collar, and a broad-brimmed soft hat. With his half-raised left hand, he makes a gesture of explanation, while with his right he is dissecting a sinew of the arm of his subject. The corpse lies on a table before him. To the right of Tulp is a group of five figures; and two other men are sitting at the table in front. These listeners are not students, but members of the guild of surgeons of Amsterdam, as shown by a paper held by one of them. They are attending to the lecture with very various expressions.

"They are all bare-headed, dressed in black, and with turned-over collars except one, who still wears the old-fashioned upright ruff. There are, perhaps, other persons present in the hall, as Tulp appears to be looking beyond the picture, as if about to address an audience not visible to the spectator; and it is here worthy of remark that Rembrandt's compositions are never imprisoned in their frames, but convey an idea of a wide space beyond them. It is somewhat singular that the spectator seems hardly to notice the corpse lying before him at full length, the feet of which he can almost touch, although it is strongly lighted in contrast to the surrounding black garments, and most faithfully presents the peculiar hue of a dead body, leaving no doubt that it was painted from nature, as well as the living heads. The admirable art of the composition consists in its power of riveting the attention to the living in the presence of death."

Amicis says: "It is difficult to express the effect produced by this picture. The first feeling is that of horror and repulsion from the corpse. The forehead is in shadow, the eyes open with the pupils turned upwards, the mouth half open as if in astonishment, the chest sunken, the legs and feet stiff, the flesh livid, and looking as if, should you touch it with your hand, it would feel cold. With this rigid body a powerful contrast is produced by the vivacious attitudes, the youthful faces, the bright, attentive eyes, full of thought, of the disciples, revealing in different degrees the avidity for knowledge, the joy of learning, curiosity, wonder, the strength of intelligence, the suspense of the mind. The master has the tranquil face, the serene eye, and the almost smiling lip of one who feels the complacency of knowledge. There is in the complexion of the group an air of mystery, gravity, and scientific solemnity, which inspires reverence and silence.