This slide by Alfred Oliver Rowden shows a mausoleum of a very distinctive shape. It appears to be the tomb constructed by twelfth century Caliph al-Nasir for his mother, Sitta Zubayda. The unusual shaped dome is cone shaped, known as a muqarnas dome, a popular style at the time it was built. It is located in Baghdad, part of an extensive cemetery. The slide is part of a set of photographs taken by Rowden when he was in Mesopotamia during the First World War. He photographed daily scenes like this to record his experiences.