Photo credits

Photos from Wikimedia Commons, used under the licences shown. Thanks to their authors.

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  Castel Sant'Angelo seen from the Ponte Sant'Angelo against a bright blue sky: the round brick drum of the old mausoleum, the square upper block with the bronze angel on top and the marble angel statues of the bridge in the foreground

  Marek Mróz · CC BY 4.0 · colours and contrast edited

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  Castel Sant'Angelo seen from the Tiber embankment on a sunny day: the massive round drum and the battlemented bastions above the river wall, with a stone pine on the left

  Joseolgon · CC BY 4.0 · colours and contrast edited

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  Castel Sant'Angelo and the Ponte Sant'Angelo seen from the Tiber embankment, with the arches and the castle reflected in the calm water under a sky of light clouds

  Dennis G. Jarvis · CC BY-SA 2.0 · colours and contrast edited

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  The Ponte Sant'Angelo leading to Castel Sant'Angelo on a bright day, with white clouds in a blue sky and some of the marble angels along the bridge parapet

  Livioandronico2013 · CC BY-SA 4.0 · colours and contrast edited

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  The Ponte Sant'Angelo leading to the castle, with two marble angel statues on their pedestals in the foreground, visitors walking on the bridge and a deep blue sky

  Quentin Lowagie / Klow · CC BY 4.0 · colours and contrast edited

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  Close view of the huge round drum of Castel Sant'Angelo, Hadrian's old mausoleum, with its rows of small arches and the battlemented outer wall in front, under a blue sky

  Carole Raddato from FRANKFURT, Germany · CC BY-SA 2.0 · colours and contrast edited

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  The top of Castel Sant'Angelo: the bronze statue of the Archangel Michael with spread wings on the summit, above the brick upper block with its loggia and the terrace where tiny figures of visitors stand

  Livioandronico2013 · CC BY-SA 4.0 · colours and contrast edited

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  An old cannon with a green bronze barrel on a wooden carriage next to a pile of round stone cannonballs in a wooden tray, on a herringbone brick floor in front of a brick wall

  AlfvanBeem · CC0 · colours and contrast edited

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  St. Peter's Basilica and its dome seen from Castel Sant'Angelo over the terracotta rooftops of the Borgo district, under a clear blue sky

  Alf van Beem · CC0 · colours and contrast edited

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  View from the castle looking down on the Ponte Sant'Angelo and the Tiber, with a tour boat passing and people walking among the angel statues of the bridge

  Dennis G. Jarvis · CC BY-SA 2.0 · colours and contrast edited

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  The Cortile dell'Angelo inside the castle: the small Renaissance chapel front of Saints Cosmas and Damian with a marble bust in a round niche, two round windows and a stone staircase beside it

  Sailko · CC BY 3.0 · colours and contrast edited

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  The curved Courtyard of Alexander VI inside the castle, with faded frescoes on the walls, a pile of stone cannonballs and a wooden catapult, under a blue sky with a few clouds

  Falk2 · CC BY-SA 4.0 · colours and contrast edited

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  The Sala Paolina, the Renaissance hall of the castle, with a gilded coffered ceiling, frescoed walls and a bright open doorway where two visitors stand as silhouettes

  Vassil · CC0 · colours and contrast edited

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  A long straight corridor of rough stone and brick inside the old mausoleum, rising toward a lit arched niche at the far end where a small display stands behind a rope

  Carole Raddato from FRANKFURT, Germany · CC BY-SA 2.0 · colours and contrast edited

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  The Passetto di Borgo, the raised brick corridor linking the castle to the Vatican, crossing the grassy dry moat on tall arches among trees and a blue sky

  Falk2 · CC BY-SA 4.0 · colours and contrast edited

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  High-angle view of Castel Sant'Angelo in warm light, with the round drum, the upper terrace where tiny visitors stand and the rooftops of Rome and a large ornate palace behind it

  Schlurcher · CC BY 4.0 · colours and contrast edited

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  The Colosseum seen from outside on a sunny day, with its three tiers of arches against a blue sky

  Christoph Strässler · CC BY-SA 2.0 · colours and contrast edited

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  St. Peter's Square in warm light, with the Egyptian obelisk on the left, the colonnades on both sides and the Basilica with its dome in the background under a blue sky

  Nan Palmero from San Antonio, TX, USA · CC BY 2.0 · colours and contrast edited

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  The Cortile della Pigna in the Vatican Museums seen from above: green lawns with red flowering pots, gravel paths with a few visitors, the long gallery wall and a large golden sphere sculpture in the distance

  Góngora · CC BY-SA 4.0 · colours and contrast edited