Rizal and Viola toured many important cities in Europe after the publication of Noli Me Tangere in Berlin. They visited cities in Germany like Potsdam, Dresden, Teschen, and Leitmeritz where Rizal met Professor Blumentritt for the first time. They also saw places in Prague like the tomb of Copernicus and St. John Nepomucene's prison. Their tour continued along the Danube River and through cities in Austria, Germany, Switzerland, and Italy like Vienna, Munich, Nuremberg, Ulm, Geneva, Turin, Milan, Venice, Florence, and Rome before Viola returned to Barcelona and Rizal prepared to return to the Philippines.