Here is my entry for the #steemitphotochallenge that has long exposure as current theme, thanks to 
This photo has been taken in Doha, the capital city of the state of Qatar, it depicts the Islamic Arts Museum at night
This is a 20 seconds exposure using my Nikon D300 combined with a Tamron 17-50mm f2.8, the other photo exifs are f/13, 22mm and ISO200