We went to a photography exhibit with the Tibbitts. Diane had read about it, and we were glad to find out as well (articles here and here). It showcased some of the oldest known photos of Doha (as well as other Gulf areas), taken by a German traveler, Hermann Burchardt, from 1903-1904. It was fascinating. The photos are taken from the original negatives, which are housed in Berlin, Germany. They have also been published in a German book, some of which can be previewed here.
We couldn't take pictures of the pictures, but this is a mosque at the Cultural Village where the exhibit took place.
While I was looking for links, I came across this site that also has old photos of Doha. Pretty interesting.