Mexico City, Mexico 1860 → 1904 → 1920 → 2014.
Brussels, Belgium in the early 20th century and now.
A city in Russia a long time ago and now.
Ireland a long time ago and now.
Buenos Aires, Argentina.
York Street in Sydney, Australia.
A city in the former Soviet Union.
Porvoo, Finland a long time ago and now.
A Town Hall in Germany.
Worthington Minnesota, USA.
Seoul, South Korea.
San Francisco, USA.