Thank you very much, eri!
It was a spotlight with blue light. All the spotlights mark the buildings where actions take place in the "Museum's Night".
Thanks for the many nice comments everybody! Greetings from Germany, Andreas
Look..!! its Cool photo ID 1000000. Warm greetings from Pakistan
Greetings from Brasil...
Eine tolle Arbeit - YSL!
Schön und geheimnisvoll..... LIKE
Danke für Besuch und nette Wort, Hans!
LG von der Ruhr, Angelika