1930’s Ablution in Saudi Arabia – Have You Been Here?

Saudi Arabs abluting before praying in a Middle Eastern city.
My grandfather took this photo sometime in the 1930’s 0r 1940’s. Here is what I know:
The men are abluting before prayer
It’s in the 1930s or 1940s
My grandfather took the photo.
It’s in Saudi Arabia, but I’m not sure where, can anyone else tell me anything about this photo?

1930's Saudi Mosque

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Damitio  (@vagodamitio) is the Editor-in-Chief for Vagobond. Life is good. You can also find him on Google+ and at Facebook