Given current sustainability requirements, the quality of the built city—its buildings and public spaces—takes on a particular importance. Yet many municipalities complain about a shortage of experts who are capable of effectively designing cities, urban districts, and urban spaces. Building on the 2014 Cologne declaration on urban design education, ‟Die Stadt zuerst” (‟The City First”), the fourteenth Konferenz zur Schönheit und Lebensfähigkeit der Stadt (Conference on the Beauty and Viability of the City) seeks to circumscribe the requisite professional expertise: what do urban planners need to know in order to design and realize sustainable and resilient cities? They require a solid knowledge concerning suitable street infrastructures,