Image Licenses

BERLIN Brandenburger Tor by Thomas Wolf, www.foto-tw.de / Wikimedia Commons / CC BY-SA 3.0

hands-black-paint-send-heart-love from Durch Katya Havok / shutterstock.com / 635534255

Kölner Dom und Hohenzollernbrücke Abenddämmerung by © Raimond Spekking / CC BY-SA 4.0 (via Wikimedia Commons)

Düsseldorf Medienhafen by https://www.flickr.com/photos/intercityimpress/10382550375 / CC BY-SA 2.0

Munich by https://pixabay.com/de/users/designerpoint-554875/ CC0

London by https://pixabay.com/de/users/fotofan1-320502/