The architecture of Lepenski Vir is characterised by trapezoid bases of structures. It is obvious that the residents of Lepenski Vir knew certain measurements according to which they regularly measured the bases of their buildings. All structures were identical and differed only in size. The roofs started immediately from the lateral sides and were made of round logs set in the shape of tent-like cabins. The entrances were always towards the Danube and were marked with stone plates from the inside. Right behind the entrances were rectangular hearths, dug into the floor and made of chopped red limestone, and which were walled with stone blocks.