Basel, Basel-Stadt, Switzerland
Mauren, Mauren, Liechtenstein
Nidau, Canton of Bern, Switzerland
Flensburg, Schleswig-Holstein, Germany
Göttingen, Lower Saxony, Germany
Oldenburg, Lower Saxony, Germany
Nanjing, Jiangsu, China
Ciudad de México, Mexico
Berlin, Berlin, Germany
Düsseldorf, Germany
Stellenbosch, South Africa
