Poster by the Union Pacific announcing the opening of the Transcontinental Railroad, 1869 Published April 27, 2017 at 417 × 965 in Poster by the Union Pacific announcing the opening of the Transcontinental Railroad, 1869 ← Previous Next → Poster by the Union Pacific announcing the opening of the Transcontinental Railroad, 1869 Poster by the Union Pacific announcing the opening of the Transcontinental Railroad, 1869