The administration building DRN is one of the best building that has been developed in Prague in last years. The architect Stanislav Fiala did a great job by a merge of the classical architecture of the old palace with the modern administration building. Our main interest was the marvellous roof garden. Our guide was Hana Pollertova, who is the maintenance chief from very beginning. Thanks to Hana for sharing her practical experience that we cannot see from our architectural desk.