• Map
    City of McKeesport & vicinity. "Entered according to Act of Congress ... by Otto Krebs..." Shows points of interest. LC Panoramic maps (2nd ed.), 799 Available also through the Library of Congress Web site as a raster image. AACR2: 651/1; 700/1
    • Contributor: Morgenroth, H. - Krebs, Otto - Otto Krebs' Sons & Co.
    • Date: 1893
  • Photo, Print, Drawing
    View of Pittsburgh & Allegheny Bird's-eye view of Pittsburgh, Pennsylvania at the confluence of the Monongahela and Allegheny Rivers; Birmingham, Pennsylvania is in the right foreground and Allegheny is in the distance on the left.
    • Contributor: Krebs, Otto
    • Date: 1874
  • Photo, Print, Drawing
    Pittsburgh, Allegheny & Birmingham Bird's-eye view of Pittsburgh at the confluence of the Monongahela, in the foreground, and the Allegheny Rivers; Birmingham is in the right foreground and Allegheny is in the distance on the left.
    • Contributor: Krebs, Otto
    • Date: 1871