After the city of Oulu was devastated by fire in 1822, Ehrenström was tasked with drawing a new plan for it.
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This plan was eventually approved by Tsar Alexander I of Russia, Grand Duke of Finland, and the city redesigned, led by German architect Carl Ludvig Engel.
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Following the Swedish defeat in the Finnish War in 1809, the region became a part of the Russian Empire, and the city of Helsinki was promoted to be the new capital of the new Grand Duchy of Finland.
Albrecht Dürer | Johan Christian Fabricius | Albrecht von Haller | Johan Galtung | Gerd Albrecht | Johan Petter Johansson | Johan Norberg | Johan Niclas Byström | Johan Museeuw | Johan Henric Kellgren | Johan de Witt | Gustav Albrecht, 5th Prince of Sayn-Wittgenstein-Berleburg | Johan Jeremiassen | Johan Gunnar Andersson | Johan Cruyff | Johan Bojer | Nils Johan Berlin | Marko Albrecht | Johan Wohlert | Johan Vande Lanotte | Johan Svendsen | Johan Reinhard | Johan Jakobsson | Johan Ferrier | Johan Falkberget | Johan de Meij | Johan Banér | George Alexander Albrecht | Alex Albrecht | Albrecht von Wallenstein |