Al finalizar la Primera Guerra Mundial, la Alsacia y Lorena fueron devueltas a Francia, de cuyo territorio aun hacen parte hoy. A partir de esta historia singular, el presente artículo pone de relieve las influencias artísticas cruzadas -tanto alemanas como francesas- que poseen los monumentos históricos de Alsacia, y su importante impacto en los crite­rios de restauración tenidos en cuenta por los arquitectos, en su recepción por parte de los especialistas -de ambas nacionalidades- en conservación, y por supuesto, en su tratamiento puntual al momento de ser restaurados. Con el estudio de este fenómeno, es posible entender la forma como las relaciones franco-alemanas han generado desde 1945 un cambio progresivo en la mirada que se presta a las realizaciones que datan de la época de dominio alemán.

The region of Alsace located between France and Germany, has been a territory with a shared history between the two nations. In the 17th century it became an integral part of the Holy Roman Empire and, with the beginning of the modern age, the imperial states were established and this region began to be part of the kingdom of France, later, after the Franco-Prussian War of 1870 , the Treaty of Frankfurt in 1871 determines that Alsace and part of Lorraine are annexed to the German Empire in which they form a Land of the Empire (Reichsland) with a state different from the other Länder, later, at the end of the First World War, the region of Alsace-Lorraine returns to the French domain, of which it is still part today. This situation led to its historical monuments having German and French influences in the aspects associated with their cultural value and therefore in the actions for their conservation, thus generating debates that confronted the supporters of the restoration of each of the parties, depending on their origin, and ask questions about the relevance in the history of the place.