In this doctoral thesis we want to examine the degree of presidentialization of the mayoralty in Flanders. The presidentialization research, which gained approval during the last decade, is built on the thesis that “regimes are becoming more presidential in their actual practice without, in most cases, changing their formal structure, that is, their regime-type” (Poguntke & Webb, 2005:1). From a classic institutional point of view, municipalities in Flanders are rather unsuited for the observation of presidentialized leadership, since the mayor is nominated by the central government and has rather limited competences. Therefore, Flanders could be considered as a least likely case. On the other hand, previous research shows that the mayor is the figure head of his party and the political leader of the executive (Steyvers, 2010b). Hence it appears that the role of the mayor can be considered as more important than constitutionally described. Poguntke & Webb (2005) distinguish in their analytical framework three domains to observe presidentialization, namely an electoral, executive and party face. The authors expect that political leaders receive more attention during electoral campaigns and that they obtain more preference votes. Furthermore, the weight and the autonomy of these leaders within the executive and the own party has increased. In our research, we translate the indicators of these authors for each of the three faces to the local context. This enables us to investigate the degree in which Flemish mayors pursue a presidentialized role. Besides this aggregated view, we will try to explain differences between the individual mayors. To explore these three faces, we appeal to two methods. The ecological data of the local elections of October 14th 2012 provides us information on the concentration of the preferential votes. To gain insight in the media attention, we calculated the number of mentions for every leading candidate in the local press, using GoPress. Besides that, mayors were questioned about their role perceptions within the three faces through an online survey. The survey was taken within the context of the Political Leaders in European Cities II research in almost thirty countries and had a response rate of 50 percent in Flanders. The results of our research on the electoral face show that the mayor is the most popular politician in eight of the ten municipalities and received a lot of media attention. Furthermore, half of the mayors state that the election shows clear presidential characteristics. Within the executive the answers of the mayors indicate that they feel quite free to enact new policy and communicate about it. The majority of the Flemish mayors thinks in a presidentialized way about his function during elections and his role within the executive. For the party face, the signs of presidentialization are less obvious. Mayors do pay a lot of attention to the opinion of the local party and accredit them a lot of influence. Besides the research on the degree of aggregated presidentialization, we focus on the differences between the individual mayors. Based on their answers from the survey, we can 240 determine for each respondent how presidentialized he looks at his mayoral function. This results in three presidentialization indexes, that enable us to determine which factors account for the individual differences in degree of presidentialization. Moreover, it allows us to look for correlations between the three faces. This research shows that mayors with a strong presidentialized view on the local electoral process, in general also act autonomous within the executive. We presume that a causal relation is hidden behind this positive correlation. Mayors that campaigned in a strong presidential way, will transform this electoral overweight to executive decision power. Between the degree of executive and party presidentialization, we obtain a negative correlation. This unexpected relation may be due to a couple of questions that were differently interpreted by the mayors. In the empirical chapter of this doctoral thesis, we examine the impact of the presidentialization indexes on the leadership and the idea of democracy of the mayors. In other words, we consider the more general consequences of the degree of presidentialization on the mayor’s way of thinking and acting. On theoretical base we can assume that strongly presidentialized mayors will choose for an authoritarian and strategic leadership. Thus, within the leaderschipmodel of Getimis & Hlepas (2006) they will act as a city boss. Bivariate analysis does show a positive correlation between two presidentialization indexes and this type of leadership. However, when we perform a multivariate analysis, the degree of presidentialization seems to have no impact on the leadership of a mayor. Moreover, we see that the presidentialization indexes give us little information about the democracy preference of the mayor. From our research, it turns out that the theory of presidentialization can be applied on local level. We conclude that a part of the mayors thinks in a presidentialized way about their political function, while the impact on their leadership is rather limited. Further research is needed to investigate the evolution over time and the degree of influence on the policy of the mayor.