Great Ormond Street Hospital. Photo credits: David Hawgood (CC BY-SA 2.0).
Paris. Pierre Blaché by Pixabay
Image by Mario Zogheb from Pixabay.
Das Postfuhramt (Berlin). Photo credits: Matthias Süßen, CC BY-SA 4.0, via Wikimedia Commons
Credits: Stephane Gaudry from Best, Netherlands, CC BY 2.0, via Wikimedia Commons