On May 25 and 26, Vienna's Mayor Dr. Michael Ludwig and the First Mayor of the Free and Hanseatic City of Hamburg, Dr. Peter Tschentscher, visited Zurich. Together with Mayor Corine Mauch, they continued the «Trilogue» between the three cities, which was launched in 2019, and deepened the exchange on key challenges to all three cities. This year's meeting in Zurich covered topics including housing, energy supply and culture; visits were made to the Kalkbreite cooperative in the Zollhaus, where guests gained insight into «Hallenwohnen», Empa's NEST and the new Tonhalle.
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