Group 3 74 Based on the produced maps, the factors which puts the Cultural Heritage (CH) sites in danger, are evaluated. Knowing the challenges, the study is to come up with ideas which would support the risk reduction, and which should facilitate the protection of the CH in Trondheim. To study the vulnerability, the model Art-Risk (Diaz et al. 2022; Moreno et al. 2022) has been adapted to Trondheim scenery. There are different models to evaluate the risk level in a heritage area (Julià & Ferreira, T., 2021). One of these models is Art-Risk, which proposes the use of vulnerability matrix and hazards to map the level of risk in a heritage landscape (Moreno et al. 2022; Diaz et al., 2022). One of the main advantages of Art-Risk is that it allows to include factors related to immaterial values to calculate the vulnerability and risk. By this reason, this model has been selected to discuss different possible scenarios after any possible emergency in cultural urban areas in Trondheim (Norway). Art Risk uses a list of vulnerability factors and describes five different levels of vulnerability (very low, low, medium, high and very high; 1, 2, 3, 4 and 5 respectively to obtain the numerical values for index) according to different possible situations. From the relationship between the worst possible scenario and the data collected in each building, a vulnerability index is obtained and represented as a percentage. The index is calculated by using the following formula: = ( ) ( ) ∗ 100 Table 1 shows the new relations established between the level of vulnerability that is evaluated according to relevant factors i.e., the current occupation, heritage value, structural modifications, maintenance for the installation system, and degree of conservation. Due to the time limitations of this study, the vulnerability levels have been simplified into 3 levels (low, medium, high). The vulnerability values have been adapted within the theoretical international framework of integral conservation (Obad, 2019). According to this theoretical framework, the interventions in heritage areas should facilitate positive impacts in the present, as well as in the future, in the territory. Besides, it should remark the necessity to include heritage management within the urban planning . This theoretical framework offers other ways to preserve the heritage than traditional approaches. This way to understand the heritage, has been defined by some scholars as something typical for Norwegian cities (Nyseth, T., & Sognnæs, J., 2013). The abovementioned model implemented to the cases of Warehouses, Nidaros Cathedral, and Dora I Archive allows to identify the factors that decrease the
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