High Quality Content by WIKIPEDIA articles! People have constructed buildings and other structures since prehistory, including bridges, amphitheatres, dams, electricity pylons, roads and canals. Building materials in present use have a long history and some of the structures built thousands of years ago can still be regarded as remarkable. The history of construction overlaps that of structural engineering. To understand why things were constructed the way they were, we also need to rely on archaeology to record the form of the parts that survive and the tools used, and other branches of history and architecture to investigate how the builders lived and recorded their accomplishments.