The master thesis is called Libeň Gasholder within the Czech Modern Art. The diplomate will work out a study of importance and meanings of Libeň gasholder within the iconography of the Czech modern art. The first part will expose the gasholder itself, its creation and its later life when it did not serve its original function any more, and will define the shifts of context in the perception of the gasholder as a part of the city. She will first briefly describe how Libeň transformed into an industrial city. The brief outline of the technology of gas production, transport and storage in the following part will clarify what determines the shape of the structure and will provide its basic typology. An independent chapter will deal with absolute forms in architecture and various meanings of sphere in the visual culture. The issues of transitions of things outside the artistic world into artistic ones will first be addressed by the depiction of Libeň gasholder in literature. The core of the thesis will lay in an analysis of a concentrated and typologically sorted art material. Based on that, the thesis will conclude with a clarification and summary of meanings ascribed to Libeň gasholder image in the context of Czech art. An image documentation will be attached to the thesis.