Daniel Libeskind designs and implements structures that are very different from each other and form contrasts in the designs he has made in historical buildings and circles. As in the different parts of the world, he designed a museum building in the city of Erbil with similar design philosophy. This structure shows a remarkable approach in terms of design criteria, architectural understanding and new conditions of building in historical environment. In this paper, the example of Erbil city museum was taken into consideration, new building design methodologies in the historical environment and evaluations about the concept of urban conservation were made. Daniel Lisbeskind, designed carried out in historic buildings and environment, such differential in the city texture (tissue), forming contrasts, structures were designed and applied. As with the world also designed a museum building in Erbil with similar design philosophy. This building, the design criteria, architectural understanding, main idea and in historical environment new construction conditions, it shows a remarkable approch in the context. Within this article, by taking samples Erbil city museum, historic environment new building design methodology and assessments have been made to the concept of urban conservation.