Abstract : This thesis aims at doing a comparison between the English crisis of 1866 and the Thai crisis of 1997. It uses a comparative method developed by recent works dealing with financial crises in the long run. This study is divided in two parts : the first one is dedicated to the English crisis of 1866 whereas the second one concerned with the analysis of the Thai crisis of 1997. In order to perform a comparison, the conclusion picks up common elements shared by the two crises. The English financial crisis comes from an institutional shock which began in 1856 and was completed in 1862. This shock is the relaxation of conditions to set up English companies, especially the possibility of registering under the limited liability regime. In the case of the Thai crisis of 1997, an institutional shock is, from 1990 on, the implementation of differential credit regulation for financial companies and commercial banks. The conclusion is dedicated to show off a specific sequence of financial crisis: an institutionnal shock provokes a different dynamics of crisis, financial companies experiencing solvency crisis while commercial banks suffering from liquidity crisis.