Dome of St Ignatius Church, photo by Harold Davis. View this image larger.

Briefly noted: this is the dome of the Jesuit St Ignatius Church, adjacent to San Francisco University. Related image: San Francisco City Hall dome.

[Nikon D300, 18-200mm VR zoom lens at 56mm (84mm in 35mm terms), 10 seconds at f/13 and ISO 100, tripod mounted.]