The Alte Pinakothek possesses eleven outstanding paintings by Rembrandt Harmensz. van Rijn (16061669), including the Self Portrait as a young man (1629), the Sacrifice of Isaac (1636), a large-format depiction of the Holy Family (c. 1634) and the Passion Cycle (16321646), which took many years to complete. The archives of the Bayerische Staatsgemäldesammlungen and the Doerner Institut include a vast amount of text documents and pictorial material relating to these eleven pictures. We owe these records to generations of art-historians, art technologists, photographers and scientists. The records of the condition of the paintings in the Alte Pinakothek and of past conservation or restoration measures extend back to the late nineteenth century. Among the items which are of more than just historical value are the delicate black-and-white glass plate negatives created in the 1920s, and the overall X-ray photographs, some of which were generated in the early days of radiographic studies of paintings.