Which person was the head of government of XXX?
Turku
Gothenburg, Sweden (since 1946) Aarhus, Denmark (since 1946) Bergen, Norway (since 1946) Saint Petersburg, Russia (at the time Leningrad, Soviet Union) (since 1953) Gdańsk, Poland (since 1958) Rostock, Germany (at the time East Germany) (since 1963) Varna, Bulgaria (since 1963) Constanţa, Romania (since 1963) Cologne, Germany (since 1967) Szeged, Hungary (since 1971) Bratislava, Slovakia (since 1976) Florence, Italy (since 1992) Tianjin, China (since 2000) Tartu, Estonia (since 2008) Turku has co-operation agreements with the following cities: