Johannes Hau (17 April 1771, Flensburg, Duchy of Schleswig - 3 August 1838, Reval) was a Baltic-German landscape painter.
In 1795, he left his hometown in the Duchy of Schleswig (which was part of Denmark) and moved to Reval in the Russian Empire.
There, he became a master painter and by 1806, he was serving as an Ältermann [de] (a type of administrative official) with the Canute Guild.
These were very popular with upper-class people from St. Petersburg, who came to visit the city's spas.
[2] He was interred at the Kopli cemetery, which was destroyed in the 1940s, during the second Soviet occupation of the Baltic states.