This thesis concerns the similarities between Flann O'Brien's novel The Third Policeman and fin-de-siècle literature, more specifically decadent literature and literature of the early avant-garde. The fact that, apart from metafiction, O'Brien's novel does not deal with aesthetics (neither when it comes to the form nor when it comes to the topic) does not invalidate the presence of fin-de-siècle elements or strategies in it; the elements only change and thus adapt to their new environment. Many of them become ironic, other ones actively contribute to the metafictional scope of the novel. The first chapter explains the parallels between The Third Policeman and fin- de-siècle literature in general. It concentrates primarily on decadent literature and its central theme of "unnaturalness." Unnaturalness occurs in variegated forms, such as artifice, artificiality or make-believe. Unnaturalness can be detected also in the protagonists themselves and even (in compliance with the metafiction of the novel) in the form of O'Brien's hellish world where the narrator finds himself. Discovering and experiencing various forms of unnaturalness go hand in hand with sense perception which is what the chapter also refers to - The Third Policeman remarkably reflects descriptions of sense experiences known from...

Urban green space has been proven by the field of environmental psychology to have high value for human well-being. Green space is also important for biodiversity. However, the management of urban green space is commonly focused on present aesthetic values and not on the level of naturalness and its consequences for humans and biodiversity. This study compares the green space situation in relation to human well-being and biodiversity in Lviv, Ukraine and Stockholm, Sweden. By sampling urban green space gradients, from unnatural to natural, as well as collecting data about visiting people and bird taxa in those areas, comparisons between these two response variables and the level of naturalness were made. The results show correlations between the level of naturalness and the social structure of human visitors as well as to the bird taxa present. The results thus indicate that both human well-being and biodiversity is positively related to the level of naturalness of green space. Since more and more people live in urban areas decision-makers should leave sufficient amounts of green space, for the inhabitants’ well-being, both people and other species, in physical planning. Given generally low levels of green space in urban settings, areas for recreation and rehabilitation should be enhanced further.