The collection and storage of rainfall and runoff from roofs, plastered courtyards and squares is called rooftop harvesting. Advantage of these surfaces are, that they their construction material is mainlyofimpermeable and easy to keep clean (e. g. by removing sediments and litter). The harvested water is generally transferred by a gutter system to cisterns or reservoirs and utilised for animals, domestic consumption and small-scale irrigation purposes. Ancient examples of this technique are known from Minoan settlements on Crete (Mays 2010a) and for Resafa in Syria (Brinker 1991) (Beckers et al. 2013).