ADA-F-003230-0000 The tower on the leonine wall, former summer residence of Leone XIII and now an astronomical observatory. Vatican City Credit: Alinari Archives, Florence WARNING: Permission must be required for non editorial use. Please contact Alinari Archives Date of artwork: IX sec. Period and style: Early Middle Ages Location: State of the Vatican City, Leonine Walls Photographer: Anderson Date of photography: 1890 ca. Place of photography: State of the Vatican City, Leonine Wall Collection: Alinari Archives-Anderson Archive, Florence Object type: glass plate Photographic technique: N silver gelatin dry negative Dimensioni: 21 X 27 cm Technical info Image sizes (pixel): 2472 X 1976 Image sizes (cm at 300 dpi): 20 X 16 Image sizes (MB): 3.19 Color space: RGB