This document summarizes the journey of Diplodocus fossils from the United States to various museums in Europe in the early 1900s. It describes how Andrew Carnegie funded excavations in Wyoming that uncovered Diplodocus fossils in the late 1890s. These fossils were then prepared and reconstructed by scientists before being sent to museums in Pittsburgh, London, and Frankfurt between 1904-1907. It outlines some of the challenges with reconstructing and transporting such large dinosaur specimens internationally and how Diplodocus became an ambassador for paleontology and helped popularize dinosaurs in Europe.