ACA-F-043351-0000 Painting portraying the release of St Peter from prison, detail of St Peter's Altarfrontal, work attributed to Guido da Siena preserved in the National Picture Gallery in Siena Credit: Alinari Archives, Florence WARNING: Permission must be required for non editorial use. Please contact Alinari Archives Artist: Guido da Siena Date of artwork: XIII sec Period and style: Middle Ages Location: Siena, National Picture Gallery Photographer: Alinari, Fratelli Date of photography: 1930 ca. Place of photography: Siena, National Picture Gallery People: Peter Collection: Alinari Archives-Alinari Archive, Florence Object type: glass plate Photographic technique: N silver gelatin dry negative Dimensioni: 21 X 27 cm Technical info Image sizes (pixel): 2376 X 1989 Image sizes (cm at 300 dpi): 20 X 16 Image sizes (MB): 3.03 Color space: RGB