SUMMARY
The study is discussing those principles of sustainability whicb are relevant for town planning. The current problems of cities are analysed looking for possibilities of their fixing in urban structure, traffic concept, resource saving, prevention of pollution, integration with the nature etc. A vision of sustainable city is presented here: it has to be liveable, saving, healthy and just. Proposals for the urban development in harmony with environment are hinted at the end and the examples of environmentally friendly settlements are marginally mentioned too.