This article concerns the historic town of Moret-Sur-Loing in the context of preservation and revalorisation, which are connected to its sustainable development. It is one of many examples, besides e.g. Heppenheim, Lorsch, Weinheim and Provins, of small European historic towns which can suitably use their cultural potential for their multidirectional development. The town of Moret-Sur-Loing is located to the south of Paris, in the Île-de-France region, in the department of Seine and Marne. The cultural landscape of Moret comprises mainly historic buildings with the magnificent Notre Dame church and numerous small-town houses, defensive walls with gates and a donjon, as well as the urban layout. Bridges are also important elements of the cultural landscape, particularly Le pont et I’Eglise which, together with the medieval defensive ramparts, creates a unique panorama. Although the historic heritage of the town is related to its past, it also has a great impact on the urban development. Protecting their culture, tradition, historic architecture and urban design, the inhabitants and the authorities in Moret-Sur-Loing spare no effort to maintain the former climate of a medieval town. They are aware that for the sustainable development of the town to progress properly, they ought to preserve their heritage, revalorise it and allow it to survive for next generations. The article contains the characteristics of the cultural landscape of the town of Moret in the context of its protection and preservation for future generations, which constitutes an important factor of sustainable development. The town will certainly set a valuable example for other, also Polish, small historic towns.