In my documentary project entitled "Sand", I deal with the transformation of Berlin's cityscape. I'm interested in the moment when a gap in the urban fabric is revealed and you get views and insights that you won't have in this form a short time later. For a long time, the cityscape of Berlin was characterized by the destruction from the Second World War and the subsequent phases of demolition and reconstruction in the eastern and western parts. Anyone moving through the city experienced a fragmented and unfinished city. Since the fall of the Berlin Wall in 1989, however, there has been an ongoing building boom in Berlin that has massively changed the cityscape. Buildings that are no longer usable or considered not to be up to date are being demolished, gaps between buildings are being filled, abandoned sites are being cleared, and entire districts are being rebuilt. In my work, however, I am concerned neither with what disappears nor with what is newly created, but rather focus on the often very short phase that lies between the removal of the old and the construction of the new. The images of excavated soil and large construction pits make it clear how massive the interventions in the urban fabric are. In addition, the inside of the city becomes visible and one looks at buildings from different phases of the city's history. And the question arises, who builds what and for whom? Moreover it is revealed what Berlin is built on: sand. The city lies in a glacial valley that was formed at the end of the last ice age, when the melt water from the ice sought a drainage path. Sand is an unreliable ground for building. The saying "to have built on sand", which goes back to a biblical parable, still refers to trusting in something that is doubtful and therefore likely to fail. So this phrase fits a city that has repeatedly „reinvented“ itself and today is once again searching for its identity. I made the documentation from 2017 to 2021. It includes more than 60 photographs that I took in both the former eastern and western parts of the city.