This study suggests creating ‘ Extinct Structure History’ as a field of bridge history. For the purpose of establishing its methodology, in this paper, a case study on the bridge construction of the Hennebique Company is carried out. For the reason a structure becomes no longer useful, there are a variety of changes of conditions, that is, designing processes, construction processes, etc. However, in the process of realization, we can see some creativity based on a resolution to complete the extinct structures. The Extinct Structure History aims to clarify the originality of the structure and the creativity of eneineer.
