Public domain scan of an architecture diagram, architectural drawing, building plan, or design, free to use, no copyright restrictions - Picryl description.
Public domain photograph of stairs, steps, free to use, no copyright restrictions image - Picryl description
Title translated from album caption. Captioned in Ottoman Turkish and French. No. 27. No. 112. In album: Imperial artillery and engineering schools, Tophane, Istanbul, Ottoman Empire, with student portraits, an More
Negative appears to be a reproduction. "513" on negative and transparency. Corresponding glass transparency (same series code) available on videodisc frame 1A-29624. Detroit Publishing Co. no. 013521. Gift; Sta More